72615771 has 10 divisors (see below), whose sum is σ = 108475532. Its totient is φ = 48410460.

The previous prime is 72615769. The next prime is 72615791. The reversal of 72615771 is 17751627.

It is not a de Polignac number, because 72615771 - 2¹ = 72615769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72615731) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 448165 + ... + 448326.

Almost surely, 2^72615771 is an apocalyptic number.

72615771 is a deficient number, since it is larger than the sum of its proper divisors (35859761).

72615771 is an equidigital number, since it uses as much as digits as its factorization.

72615771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896503 (or 896494 counting only the distinct ones).

The product of its digits is 20580, while the sum is 36.

The square root of 72615771 is about 8521.4887783767. The cubic root of 72615771 is about 417.1993767355.

The spelling of 72615771 in words is "seventy-two million, six hundred fifteen thousand, seven hundred seventy-one".