72156763 has 6 divisors (see below), whose sum is σ = 83937516. Its totient is φ = 61848612.

The previous prime is 72156739. The next prime is 72156767. The reversal of 72156763 is 36765127.

It is not a de Polignac number, because 72156763 - 2²⁵ = 38602331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72156767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 736245 + ... + 736342.

It is an arithmetic number, because the mean of its divisors is an integer number (13989586).

Almost surely, 2^72156763 is an apocalyptic number.

72156763 is a deficient number, since it is larger than the sum of its proper divisors (11780753).

72156763 is a wasteful number, since it uses less digits than its factorization.

72156763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472601 (or 1472594 counting only the distinct ones).

The product of its digits is 52920, while the sum is 37.

The square root of 72156763 is about 8494.5137000302. The cubic root of 72156763 is about 416.3184718437.

The spelling of 72156763 in words is "seventy-two million, one hundred fifty-six thousand, seven hundred sixty-three".