72389813265 has 64 divisors (see below), whose sum is σ = 160448440320. Its totient is φ = 30084073920.

The previous prime is 72389813239. The next prime is 72389813267. The reversal of 72389813265 is 56231898327.

72389813265 is a `hidden beast` number, since 7 + 238 + 9 + 81 + 326 + 5 = 666.

It is not a de Polignac number, because 72389813265 - 2⁶ = 72389813201 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72389813267) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3471559 + ... + 3492348.

It is an arithmetic number, because the mean of its divisors is an integer number (2507006880).

Almost surely, 2^72389813265 is an apocalyptic number.

It is an amenable number.

72389813265 is an abundant number, since it is smaller than the sum of its proper divisors (88058627055).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72389813265 is a wasteful number, since it uses less digits than its factorization.

72389813265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6963939 (or 6963933 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 72389813265 in words is "seventy-two billion, three hundred eighty-nine million, eight hundred thirteen thousand, two hundred sixty-five".