140585252809 has 9 divisors (see below), whose sum is σ = 141334226631. Its totient is φ = 139840233120.

The previous prime is 140585252761. The next prime is 140585252837. The reversal of 140585252809 is 908252585041.

The square root of 140585252809 is 374947.

It is a perfect power (a square), and thus also a powerful number.

140585252809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 71243617225 + 69341635584 = 266915^2 + 263328^2 .

It is not a de Polignac number, because 140585252809 - 2²⁵ = 140551698377 is a prime.

It is a super-3 number, since 3×140585252809³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140585252879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 79112929 + ... + 79114705.

It is an arithmetic number, because the mean of its divisors is an integer number (15703802959).

Almost surely, 2^140585252809 is an apocalyptic number.

140585252809 is the 374947-th square number.

140585252809 is the 187474-th centered octagonal number.

It is an amenable number.

140585252809 is a deficient number, since it is larger than the sum of its proper divisors (748973822).

140585252809 is an frugal number, since it uses more digits than its factorization.

140585252809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976 (or 1988 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 49.

Multiplying 140585252809 by its sum of digits (49), we get a square (6888677387641 = 2624629²).

The spelling of 140585252809 in words is "one hundred forty billion, five hundred eighty-five million, two hundred fifty-two thousand, eight hundred nine".