72607220217 has 24 divisors (see below), whose sum is σ = 126167936960. Its totient is φ = 39306163680.

The previous prime is 72607220149. The next prime is 72607220233. The reversal of 72607220217 is 71202270627.

72607220217 is a `hidden beast` number, since 7 + 2 + 607 + 2 + 20 + 21 + 7 = 666.

It is not a de Polignac number, because 72607220217 - 2⁷ = 72607220089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72607220267) 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, 30327634 + ... + 30330027.

Almost surely, 2^72607220217 is an apocalyptic number.

It is an amenable number.

72607220217 is a deficient number, since it is larger than the sum of its proper divisors (53560716743).

72607220217 is a wasteful number, since it uses less digits than its factorization.

72607220217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60657693 (or 60657690 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The spelling of 72607220217 in words is "seventy-two billion, six hundred seven million, two hundred twenty thousand, two hundred seventeen".