72746688642 has 32 divisors (see below), whose sum is σ = 148891889664. Its totient is φ = 23684581200.

The previous prime is 72746688631. The next prime is 72746688697. The reversal of 72746688642 is 24688664727.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124234 + ... + 401157.

It is an arithmetic number, because the mean of its divisors is an integer number (4652871552).

Almost surely, 2^72746688642 is an apocalyptic number.

72746688642 is an abundant number, since it is smaller than the sum of its proper divisors (76145201022).

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

72746688642 is a wasteful number, since it uses less digits than its factorization.

72746688642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525934.

The product of its digits is 43352064, while the sum is 60.

The spelling of 72746688642 in words is "seventy-two billion, seven hundred forty-six million, six hundred eighty-eight thousand, six hundred forty-two".