21623546553356 has 192 divisors, whose sum is σ = 45863706470400. Its totient is φ = 8799436800000.

The previous prime is 21623546553331. The next prime is 21623546553377. The reversal of 21623546553356 is 65335564532612.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2402344856 + ... + 2402353856.

It is an arithmetic number, because the mean of its divisors is an integer number (238873471200).

Almost surely, 2^{21623546553356} is an apocalyptic number.

It is an amenable number.

21623546553356 is an abundant number, since it is smaller than the sum of its proper divisors (24240159917044).

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

21623546553356 is a wasteful number, since it uses less digits than its factorization.

21623546553356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816 (or 9814 counting only the distinct ones).

The product of its digits is 58320000, while the sum is 56.

The spelling of 21623546553356 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred forty-six million, five hundred fifty-three thousand, three hundred fifty-six".