72616041565 has 16 divisors (see below), whose sum is σ = 89780621616. Its totient is φ = 56348300800.

The previous prime is 72616041517. The next prime is 72616041599. The reversal of 72616041565 is 56514061627.

It can be written as a sum of positive squares in 8 ways, for example, as 952216164 + 71663825401 = 30858^2 + 267701^2 .

It is not a de Polignac number, because 72616041565 - 2²¹ = 72613944413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988306 + ... + 1059235.

It is an arithmetic number, because the mean of its divisors is an integer number (5611288851).

Almost surely, 2^72616041565 is an apocalyptic number.

It is an amenable number.

72616041565 is a deficient number, since it is larger than the sum of its proper divisors (17164580051).

72616041565 is a wasteful number, since it uses less digits than its factorization.

72616041565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047760.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 72616041565 in words is "seventy-two billion, six hundred sixteen million, forty-one thousand, five hundred sixty-five".