140688815369 has 4 divisors (see below), whose sum is σ = 145540153860. Its totient is φ = 135837476880.

The previous prime is 140688815363. The next prime is 140688815419. The reversal of 140688815369 is 963518886041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110068015225 + 30620800144 = 331765^2 + 174988^2 .

It is a cyclic number.

It is not a de Polignac number, because 140688815369 - 2¹⁶ = 140688749833 is a prime.

It is a super-2 number, since 2×140688815369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140688815363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2425669202 + ... + 2425669259.

It is an arithmetic number, because the mean of its divisors is an integer number (36385038465).

Almost surely, 2^140688815369 is an apocalyptic number.

It is an amenable number.

140688815369 is a deficient number, since it is larger than the sum of its proper divisors (4851338491).

140688815369 is an equidigital number, since it uses as much as digits as its factorization.

140688815369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851338490.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 140688815369 in words is "one hundred forty billion, six hundred eighty-eight million, eight hundred fifteen thousand, three hundred sixty-nine".