12575018961621 has 8 divisors (see below), whose sum is σ = 18629657720960. Its totient is φ = 8383345974396.

The previous prime is 12575018961613. The next prime is 12575018961629. The reversal of 12575018961621 is 12616981057521.

12575018961621 is a `hidden beast` number, since 1 + 2 + 5 + 7 + 5 + 0 + 1 + 8 + 9 + 6 + 1 + 621 = 666.

It is an interprime number because it is at equal distance from previous prime (12575018961613) and next prime (12575018961629).

It is not a de Polignac number, because 12575018961621 - 2³ = 12575018961613 is a prime.

It is a super-2 number, since 2×12575018961621² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12575018961629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232870721485 + ... + 232870721538.

It is an arithmetic number, because the mean of its divisors is an integer number (2328707215120).

Almost surely, 2^{12575018961621} is an apocalyptic number.

It is an amenable number.

12575018961621 is a deficient number, since it is larger than the sum of its proper divisors (6054638759339).

12575018961621 is an equidigital number, since it uses as much as digits as its factorization.

12575018961621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465741443032 (or 465741443026 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The spelling of 12575018961621 in words is "twelve trillion, five hundred seventy-five billion, eighteen million, nine hundred sixty-one thousand, six hundred twenty-one".