12558003864 has 128 divisors (see below), whose sum is σ = 38731392000. Its totient is φ = 3313626624.

The previous prime is 12558003859. The next prime is 12558003949. The reversal of 12558003864 is 46830085521.

It is a super-2 number, since 2×12558003864² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56022 + ... + 168090.

It is an arithmetic number, because the mean of its divisors is an integer number (302589000).

Almost surely, 2^12558003864 is an apocalyptic number.

12558003864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12558003864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19365696000).

12558003864 is an abundant number, since it is smaller than the sum of its proper divisors (26173388136).

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

12558003864 is a wasteful number, since it uses less digits than its factorization.

12558003864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112137 (or 112133 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 12558003864 in words is "twelve billion, five hundred fifty-eight million, three thousand, eight hundred sixty-four".