12566940519 has 32 divisors (see below), whose sum is σ = 19391892480. Its totient is φ = 7090739712.

The previous prime is 12566940509. The next prime is 12566940523. The reversal of 12566940519 is 91504966521.

It is not a de Polignac number, because 12566940519 - 2⁷ = 12566940391 is a prime.

It is a super-2 number, since 2×12566940519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566940509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628494 + ... + 648180.

It is an arithmetic number, because the mean of its divisors is an integer number (605996640).

Almost surely, 2^12566940519 is an apocalyptic number.

12566940519 is a deficient number, since it is larger than the sum of its proper divisors (6824951961).

12566940519 is a wasteful number, since it uses less digits than its factorization.

12566940519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20079.

The product of its (nonzero) digits is 583200, while the sum is 48.

The spelling of 12566940519 in words is "twelve billion, five hundred sixty-six million, nine hundred forty thousand, five hundred nineteen".