72363233665 has 4 divisors (see below), whose sum is σ = 86835880404. Its totient is φ = 57890586928.

The previous prime is 72363233653. The next prime is 72363233689. The reversal of 72363233665 is 56633236327.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33097433329 + 39265800336 = 181927^2 + 198156^2 .

It is a cyclic number.

It is not a de Polignac number, because 72363233665 - 2⁵ = 72363233633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7236323362 + ... + 7236323371.

It is an arithmetic number, because the mean of its divisors is an integer number (21708970101).

Almost surely, 2^72363233665 is an apocalyptic number.

It is an amenable number.

72363233665 is a deficient number, since it is larger than the sum of its proper divisors (14472646739).

72363233665 is a wasteful number, since it uses less digits than its factorization.

72363233665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14472646738.

The product of its digits is 2449440, while the sum is 46.

The spelling of 72363233665 in words is "seventy-two billion, three hundred sixty-three million, two hundred thirty-three thousand, six hundred sixty-five".