78931440403 has 64 divisors (see below), whose sum is σ = 91155456000. Its totient is φ = 67994035200.

The previous prime is 78931440397. The next prime is 78931440443. The reversal of 78931440403 is 30404413987.

It is not a de Polignac number, because 78931440403 - 2²⁵ = 78897885971 is a prime.

It is a super-3 number, since 3×78931440403³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78931440403.

It is not an unprimeable number, because it can be changed into a prime (78931440443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83879913 + ... + 83880853.

It is an arithmetic number, because the mean of its divisors is an integer number (1424304000).

Almost surely, 2^78931440403 is an apocalyptic number.

78931440403 is a deficient number, since it is larger than the sum of its proper divisors (12224015597).

78931440403 is a wasteful number, since it uses less digits than its factorization.

78931440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 78931440403 in words is "seventy-eight billion, nine hundred thirty-one million, four hundred forty thousand, four hundred three".