78489764272 has 20 divisors (see below), whose sum is σ = 152101733616. Its totient is φ = 39237704000.

The previous prime is 78489764159. The next prime is 78489764357. The reversal of 78489764272 is 27246798487.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357868 + ... + 533899.

Almost surely, 2^78489764272 is an apocalyptic number.

It is an amenable number.

78489764272 is a deficient number, since it is larger than the sum of its proper divisors (73611969344).

78489764272 is a wasteful number, since it uses less digits than its factorization.

78489764272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897276 (or 897270 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 64.

The spelling of 78489764272 in words is "seventy-eight billion, four hundred eighty-nine million, seven hundred sixty-four thousand, two hundred seventy-two".