21576576157108 has 24 divisors (see below), whose sum is σ = 43160463021312. Its totient is φ = 9245537487264.

The previous prime is 21576576157061. The next prime is 21576576157133. The reversal of 21576576157108 is 80175167567512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65105935 + ... + 65436502.

It is an arithmetic number, because the mean of its divisors is an integer number (1798352625888).

Almost surely, 2^{21576576157108} is an apocalyptic number.

21576576157108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21576576157108 is an abundant number, since it is smaller than the sum of its proper divisors (21583886864204).

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

21576576157108 is a wasteful number, since it uses less digits than its factorization.

21576576157108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130548351 (or 130548349 counting only the distinct ones).

The product of its (nonzero) digits is 24696000, while the sum is 61.

The spelling of 21576576157108 in words is "twenty-one trillion, five hundred seventy-six billion, five hundred seventy-six million, one hundred fifty-seven thousand, one hundred eight".