78788372601321 has 40 divisors (see below), whose sum is σ = 119430969768000. Its totient is φ = 51752347204320.

The previous prime is 78788372601241. The next prime is 78788372601361. The reversal of 78788372601321 is 12310627388787.

78788372601321 is a `hidden beast` number, since 7 + 8 + 78 + 8 + 372 + 60 + 132 + 1 = 666.

It is not a de Polignac number, because 78788372601321 - 2²³ = 78788364212713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78788372601361) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4486110 + ... + 13330488.

It is an arithmetic number, because the mean of its divisors is an integer number (2985774244200).

Almost surely, 2^{78788372601321} is an apocalyptic number.

78788372601321 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

78788372601321 is a deficient number, since it is larger than the sum of its proper divisors (40642597166679).

78788372601321 is a wasteful number, since it uses less digits than its factorization.

78788372601321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8846011 (or 8846002 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 63.

The spelling of 78788372601321 in words is "seventy-eight trillion, seven hundred eighty-eight billion, three hundred seventy-two million, six hundred one thousand, three hundred twenty-one".