13157237026 has 8 divisors (see below), whose sum is σ = 19756831644. Its totient is φ = 6571626480.

The previous prime is 13157236999. The next prime is 13157237047. The reversal of 13157237026 is 62073275131.

It is a Cunningham number, because it is equal to 114705²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 13157237025 + 1 = 114705^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13157237026² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3493665 + ... + 3497428.

Almost surely, 2^13157237026 is an apocalyptic number.

13157237026 is a deficient number, since it is larger than the sum of its proper divisors (6599594618).

13157237026 is an equidigital number, since it uses as much as digits as its factorization.

13157237026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992036.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 13157237026 in words is "thirteen billion, one hundred fifty-seven million, two hundred thirty-seven thousand, twenty-six".