72644346786 has 16 divisors (see below), whose sum is σ = 158496756768. Its totient is φ = 22013438400.

The previous prime is 72644346769. The next prime is 72644346799. The reversal of 72644346786 is 68764344627.

It is a happy number.

It is a super-2 number, since 2×72644346786² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 550335895 + ... + 550336026.

It is an arithmetic number, because the mean of its divisors is an integer number (9906047298).

Almost surely, 2^72644346786 is an apocalyptic number.

72644346786 is an abundant number, since it is smaller than the sum of its proper divisors (85852409982).

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

72644346786 is a wasteful number, since it uses less digits than its factorization.

72644346786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100671937.

The product of its digits is 32514048, while the sum is 57.

The spelling of 72644346786 in words is "seventy-two billion, six hundred forty-four million, three hundred forty-six thousand, seven hundred eighty-six".