78665272729232 has 30 divisors (see below), whose sum is σ = 177297878716758. Its totient is φ = 33713688312192.

The previous prime is 78665272729229. The next prime is 78665272729261. The reversal of 78665272729232 is 23292727256687.

78665272729232 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 64284218849536 + 14381053879696 = 8017744^2 + 3792236^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50169178253 + ... + 50169179820.

Almost surely, 2^{78665272729232} is an apocalyptic number.

It is an amenable number.

78665272729232 is an abundant number, since it is smaller than the sum of its proper divisors (98632605987526).

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

78665272729232 is a wasteful number, since it uses less digits than its factorization.

78665272729232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100338358095 (or 100338358082 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 68.

The spelling of 78665272729232 in words is "seventy-eight trillion, six hundred sixty-five billion, two hundred seventy-two million, seven hundred twenty-nine thousand, two hundred thirty-two".