72077787506 has 16 divisors (see below), whose sum is σ = 109035521280. Its totient is φ = 35733691200.

The previous prime is 72077787487. The next prime is 72077787533. The reversal of 72077787506 is 60578777027.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135146 + ... + 403013.

It is an arithmetic number, because the mean of its divisors is an integer number (6814720080).

Almost surely, 2^72077787506 is an apocalyptic number.

72077787506 is a deficient number, since it is larger than the sum of its proper divisors (36957733774).

72077787506 is a wasteful number, since it uses less digits than its factorization.

72077787506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538729.

The product of its (nonzero) digits is 8067360, while the sum is 56.

The spelling of 72077787506 in words is "seventy-two billion, seventy-seven million, seven hundred eighty-seven thousand, five hundred six".