15256135643 has 12 divisors (see below), whose sum is σ = 17749374552. Its totient is φ = 13074888960.

The previous prime is 15256135627. The next prime is 15256135669. The reversal of 15256135643 is 34653165251.

It is not a de Polignac number, because 15256135643 - 2⁴ = 15256135627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15256135643.

It is not an unprimeable number, because it can be changed into a prime (15256135613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437996 + ... + 471542.

It is an arithmetic number, because the mean of its divisors is an integer number (1479114546).

Almost surely, 2^15256135643 is an apocalyptic number.

15256135643 is a deficient number, since it is larger than the sum of its proper divisors (2493238909).

15256135643 is an equidigital number, since it uses as much as digits as its factorization.

15256135643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42842 (or 42835 counting only the distinct ones).

The product of its digits is 324000, while the sum is 41.

The spelling of 15256135643 in words is "fifteen billion, two hundred fifty-six million, one hundred thirty-five thousand, six hundred forty-three".