12576155917 has 18 divisors (see below), whose sum is σ = 14302624938. Its totient is φ = 10991053728.

The previous prime is 12576155899. The next prime is 12576155987. The reversal of 12576155917 is 71955167521.

It can be written as a sum of positive squares in 3 ways, for example, as 2025990121 + 10550165796 = 45011^2 + 102714^2 .

It is not a de Polignac number, because 12576155917 - 2³¹ = 10428672269 is a prime.

It is a super-2 number, since 2×12576155917² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12576155987) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7681623 + ... + 7683259.

Almost surely, 2^12576155917 is an apocalyptic number.

It is an amenable number.

12576155917 is a deficient number, since it is larger than the sum of its proper divisors (1726469021).

12576155917 is an frugal number, since it uses more digits than its factorization.

12576155917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325 (or 1669 counting only the distinct ones).

The product of its digits is 661500, while the sum is 49.

The spelling of 12576155917 in words is "twelve billion, five hundred seventy-six million, one hundred fifty-five thousand, nine hundred seventeen".