72615911 has 2 divisors, whose sum is σ = 72615912. Its totient is φ = 72615910.

The previous prime is 72615841. The next prime is 72615979. The reversal of 72615911 is 11951627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72615911 - 2²² = 68421607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72215911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36307955 + 36307956.

It is an arithmetic number, because the mean of its divisors is an integer number (36307956).

Almost surely, 2^72615911 is an apocalyptic number.

72615911 is a deficient number, since it is larger than the sum of its proper divisors (1).

72615911 is an equidigital number, since it uses as much as digits as its factorization.

72615911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 72615911 is about 8521.4969928998. The cubic root of 72615911 is about 417.1996448493.

The spelling of 72615911 in words is "seventy-two million, six hundred fifteen thousand, nine hundred eleven".