12553675638 has 48 divisors (see below), whose sum is σ = 29490140160. Its totient is φ = 3551932944.

The previous prime is 12553675613. The next prime is 12553675639. The reversal of 12553675638 is 83657635521.

It is a super-4 number, since 4×12553675638⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553675639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176998 + ... + 237561.

It is an arithmetic number, because the mean of its divisors is an integer number (614377920).

Almost surely, 2^12553675638 is an apocalyptic number.

12553675638 is an abundant number, since it is smaller than the sum of its proper divisors (16936464522).

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

12553675638 is a wasteful number, since it uses less digits than its factorization.

12553675638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414681 (or 414674 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 51.

The spelling of 12553675638 in words is "twelve billion, five hundred fifty-three million, six hundred seventy-five thousand, six hundred thirty-eight".