72656051 has 4 divisors (see below), whose sum is σ = 78244992. Its totient is φ = 67067112.

The previous prime is 72656041. The next prime is 72656071. The reversal of 72656051 is 15065627.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72656051 - 2²² = 68461747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72655999 and 72656017.

It is not an unprimeable number, because it can be changed into a prime (72656041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794451 + ... + 2794476.

It is an arithmetic number, because the mean of its divisors is an integer number (19561248).

Almost surely, 2^72656051 is an apocalyptic number.

72656051 is a deficient number, since it is larger than the sum of its proper divisors (5588941).

72656051 is a wasteful number, since it uses less digits than its factorization.

72656051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588940.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 72656051 is about 8523.8518874978. The cubic root of 72656051 is about 417.2765027023.

The spelling of 72656051 in words is "seventy-two million, six hundred fifty-six thousand, fifty-one".