5156521856186 has 4 divisors (see below), whose sum is σ = 7734782784282. Its totient is φ = 2578260928092.

The previous prime is 5156521856159. The next prime is 5156521856257. The reversal of 5156521856186 is 6816581256515.

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., 4995756944161 + 160764912025 = 2235119^2 + 400955^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289130464045 + ... + 1289130464048.

Almost surely, 2^{5156521856186} is an apocalyptic number.

5156521856186 is a deficient number, since it is larger than the sum of its proper divisors (2578260928096).

5156521856186 is a wasteful number, since it uses less digits than its factorization.

5156521856186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578260928095.

The product of its digits is 17280000, while the sum is 59.

The spelling of 5156521856186 in words is "five trillion, one hundred fifty-six billion, five hundred twenty-one million, eight hundred fifty-six thousand, one hundred eighty-six".