12581340892 has 48 divisors (see below), whose sum is σ = 23436000000. Its totient is φ = 5889371904.

The previous prime is 12581340881. The next prime is 12581340971. The reversal of 12581340892 is 29804318521.

It is a super-2 number, since 2×12581340892² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20324959 + ... + 20325577.

It is an arithmetic number, because the mean of its divisors is an integer number (488250000).

Almost surely, 2^12581340892 is an apocalyptic number.

It is an amenable number.

12581340892 is a deficient number, since it is larger than the sum of its proper divisors (10854659108).

12581340892 is a wasteful number, since it uses less digits than its factorization.

12581340892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1736 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 12581340892 in words is "twelve billion, five hundred eighty-one million, three hundred forty thousand, eight hundred ninety-two".