140209539165 has 40 divisors (see below), whose sum is σ = 252084638520. Its totient is φ = 74556453888.

The previous prime is 140209539143. The next prime is 140209539203. The reversal of 140209539165 is 561935902041.

It can be written as a sum of positive squares in 4 ways, for example, as 3902375961 + 136307163204 = 62469^2 + 369198^2 .

It is not a de Polignac number, because 140209539165 - 2²⁴ = 140192761949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 140209539165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 377160 + ... + 650129.

It is an arithmetic number, because the mean of its divisors is an integer number (6302115963).

Almost surely, 2^140209539165 is an apocalyptic number.

140209539165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140209539165 is a deficient number, since it is larger than the sum of its proper divisors (111875099355).

140209539165 is a wasteful number, since it uses less digits than its factorization.

140209539165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027643 (or 1027634 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 140209539165 in words is "one hundred forty billion, two hundred nine million, five hundred thirty-nine thousand, one hundred sixty-five".