12564223700 has 36 divisors (see below), whose sum is σ = 31159276512. Its totient is φ = 4307733600.

The previous prime is 12564223649. The next prime is 12564223733. The reversal of 12564223700 is 732246521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8973746 + ... + 8975145.

Almost surely, 2^12564223700 is an apocalyptic number.

12564223700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12564223700 is an abundant number, since it is smaller than the sum of its proper divisors (18595052812).

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

12564223700 is a wasteful number, since it uses less digits than its factorization.

12564223700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17948912 (or 17948905 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 12564223700 in words is "twelve billion, five hundred sixty-four million, two hundred twenty-three thousand, seven hundred".