21623546553125 has 48 divisors (see below), whose sum is σ = 29541384355392. Its totient is φ = 15696018000000.

The previous prime is 21623546553083. The next prime is 21623546553151. The reversal of 21623546553125 is 52135564532612.

It is not a de Polignac number, because 21623546553125 - 2⁶ = 21623546553061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17305682 + ... + 18513068.

It is an arithmetic number, because the mean of its divisors is an integer number (615445507404).

Almost surely, 2^{21623546553125} is an apocalyptic number.

21623546553125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21623546553125 is a deficient number, since it is larger than the sum of its proper divisors (7917837802267).

21623546553125 is an equidigital number, since it uses as much as digits as its factorization.

21623546553125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207944 (or 1207924 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 50.

The spelling of 21623546553125 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred forty-six million, five hundred fifty-three thousand, one hundred twenty-five".