72946179621 has 24 divisors (see below), whose sum is σ = 125654705280. Its totient is φ = 39871202976.

The previous prime is 72946179611. The next prime is 72946179697. The reversal of 72946179621 is 12697164927.

72946179621 is a `hidden beast` number, since 7 + 2 + 9 + 4 + 6 + 1 + 7 + 9 + 621 = 666.

It is not a de Polignac number, because 72946179621 - 2¹⁰ = 72946178597 is a prime.

It is a super-2 number, since 2×72946179621² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72946179611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25169766 + ... + 25172663.

It is an arithmetic number, because the mean of its divisors is an integer number (5235612720).

Almost surely, 2^72946179621 is an apocalyptic number.

It is an amenable number.

72946179621 is a deficient number, since it is larger than the sum of its proper divisors (52708525659).

72946179621 is a wasteful number, since it uses less digits than its factorization.

72946179621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50342465 (or 50342462 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 72946179621 in words is "seventy-two billion, nine hundred forty-six million, one hundred seventy-nine thousand, six hundred twenty-one".