72644330915 has 32 divisors (see below), whose sum is σ = 97855356480. Its totient is φ = 51416031744.

The previous prime is 72644330851. The next prime is 72644330917. The reversal of 72644330915 is 51903344627.

It is a cyclic number.

It is not a de Polignac number, because 72644330915 - 2⁶ = 72644330851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72644330917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64280 + ... + 386549.

It is an arithmetic number, because the mean of its divisors is an integer number (3057979890).

Almost surely, 2^72644330915 is an apocalyptic number.

72644330915 is a deficient number, since it is larger than the sum of its proper divisors (25211025565).

72644330915 is a wasteful number, since it uses less digits than its factorization.

72644330915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450951.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 72644330915 in words is "seventy-two billion, six hundred forty-four million, three hundred thirty thousand, nine hundred fifteen".