13155865258 has 4 divisors (see below), whose sum is σ = 19733797890. Its totient is φ = 6577932628.

The previous prime is 13155865249. The next prime is 13155865291. The reversal of 13155865258 is 85256855131.

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

It can be written as a sum of positive squares in only one way, i.e., 11674154209 + 1481711049 = 108047^2 + 38493^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3288966313 + ... + 3288966316.

Almost surely, 2^13155865258 is an apocalyptic number.

13155865258 is a deficient number, since it is larger than the sum of its proper divisors (6577932632).

13155865258 is an equidigital number, since it uses as much as digits as its factorization.

13155865258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6577932631.

The product of its digits is 1440000, while the sum is 49.

The spelling of 13155865258 in words is "thirteen billion, one hundred fifty-five million, eight hundred sixty-five thousand, two hundred fifty-eight".