13115157544 has 16 divisors (see below), whose sum is σ = 24598645920. Its totient is φ = 6555518640.

The previous prime is 13115157511. The next prime is 13115157547. The reversal of 13115157544 is 44575151131.

It is a super-2 number, since 2×13115157544² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13115157547) 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, 230292 + ... + 281539.

It is an arithmetic number, because the mean of its divisors is an integer number (1537415370).

Almost surely, 2^13115157544 is an apocalyptic number.

It is an amenable number.

13115157544 is a deficient number, since it is larger than the sum of its proper divisors (11483488376).

13115157544 is a wasteful number, since it uses less digits than its factorization.

13115157544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515040 (or 515036 counting only the distinct ones).

The product of its digits is 42000, while the sum is 37.

The spelling of 13115157544 in words is "thirteen billion, one hundred fifteen million, one hundred fifty-seven thousand, five hundred forty-four".