78320902402 has 64 divisors (see below), whose sum is σ = 136323060480. Its totient is φ = 33507219456.

The previous prime is 78320902397. The next prime is 78320902447. The reversal of 78320902402 is 20420902387.

It is a super-2 number, since 2×78320902402² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1722403 + ... + 1767289.

It is an arithmetic number, because the mean of its divisors is an integer number (2130047820).

Almost surely, 2^78320902402 is an apocalyptic number.

78320902402 is a deficient number, since it is larger than the sum of its proper divisors (58002158078).

78320902402 is a wasteful number, since it uses less digits than its factorization.

78320902402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45035.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 78320902402 in words is "seventy-eight billion, three hundred twenty million, nine hundred two thousand, four hundred two".