72176112880021 has 16 divisors (see below), whose sum is σ = 77405380084800. Its totient is φ = 67094182569600.

The previous prime is 72176112880013. The next prime is 72176112880033. The reversal of 72176112880021 is 12008821167127.

It is a cyclic number.

It is not a de Polignac number, because 72176112880021 - 2³ = 72176112880013 is a prime.

It is a super-2 number, since 2×72176112880021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72176112886021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58899520 + ... + 60112441.

It is an arithmetic number, because the mean of its divisors is an integer number (4837836255300).

Almost surely, 2^{72176112880021} is an apocalyptic number.

It is an amenable number.

72176112880021 is a deficient number, since it is larger than the sum of its proper divisors (5229267204779).

72176112880021 is a wasteful number, since it uses less digits than its factorization.

72176112880021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119012580.

The product of its (nonzero) digits is 150528, while the sum is 46.

The spelling of 72176112880021 in words is "seventy-two trillion, one hundred seventy-six billion, one hundred twelve million, eight hundred eighty thousand, twenty-one".