15255955813 has 12 divisors (see below), whose sum is σ = 17750520480. Its totient is φ = 13073736312.

The previous prime is 15255955783. The next prime is 15255955829. The reversal of 15255955813 is 31855955251.

It is not a de Polignac number, because 15255955813 - 2⁹ = 15255955301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15255955213) 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, 217120 + ... + 278662.

It is an arithmetic number, because the mean of its divisors is an integer number (1479210040).

Almost surely, 2^15255955813 is an apocalyptic number.

It is an amenable number.

15255955813 is a deficient number, since it is larger than the sum of its proper divisors (2494564667).

15255955813 is an equidigital number, since it uses as much as digits as its factorization.

15255955813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66616 (or 66609 counting only the distinct ones).

The product of its digits is 1350000, while the sum is 49.

The spelling of 15255955813 in words is "fifteen billion, two hundred fifty-five million, nine hundred fifty-five thousand, eight hundred thirteen".