12658438156512 has 96 divisors (see below), whose sum is σ = 34509909319200. Its totient is φ = 4059310768128.

The previous prime is 12658438156471. The next prime is 12658438156531. The reversal of 12658438156512 is 21565183485621.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×12658438156512² (a number of 27 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, 19704937 + ... + 20337192.

It is an arithmetic number, because the mean of its divisors is an integer number (359478222075).

Almost surely, 2^{12658438156512} is an apocalyptic number.

12658438156512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12658438156512 is an abundant number, since it is smaller than the sum of its proper divisors (21851471162688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12658438156512 is a wasteful number, since it uses less digits than its factorization.

12658438156512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40042268 (or 40042260 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 57.

The spelling of 12658438156512 in words is "twelve trillion, six hundred fifty-eight billion, four hundred thirty-eight million, one hundred fifty-six thousand, five hundred twelve".