12811256770 has 16 divisors (see below), whose sum is σ = 24834128760. Its totient is φ = 4730310144.

The previous prime is 12811256747. The next prime is 12811256791. The reversal of 12811256770 is 7765211821.

It can be written as a sum of positive squares in 4 ways, for example, as 10483097769 + 2328159001 = 102387^2 + 48251^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49273935 + ... + 49274194.

Almost surely, 2^12811256770 is an apocalyptic number.

12811256770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12811256770 is a deficient number, since it is larger than the sum of its proper divisors (12022871990).

12811256770 is a wasteful number, since it uses less digits than its factorization.

12811256770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98548149.

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 12811256770 in words is "twelve billion, eight hundred eleven million, two hundred fifty-six thousand, seven hundred seventy".