72864651 has 4 divisors (see below), whose sum is σ = 97152872. Its totient is φ = 48576432.

The previous prime is 72864643. The next prime is 72864691. The reversal of 72864651 is 15646827.

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

It is not a de Polignac number, because 72864651 - 2³ = 72864643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72864691) 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, 12144106 + ... + 12144111.

It is an arithmetic number, because the mean of its divisors is an integer number (24288218).

Almost surely, 2^72864651 is an apocalyptic number.

72864651 is a deficient number, since it is larger than the sum of its proper divisors (24288221).

72864651 is a wasteful number, since it uses less digits than its factorization.

72864651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24288220.

The product of its digits is 80640, while the sum is 39.

The square root of 72864651 is about 8536.0793693592. The cubic root of 72864651 is about 417.6754633170.

The spelling of 72864651 in words is "seventy-two million, eight hundred sixty-four thousand, six hundred fifty-one".