78380400502 has 16 divisors (see below), whose sum is σ = 118839035952. Its totient is φ = 38767772160.

The previous prime is 78380400479. The next prime is 78380400517. The reversal of 78380400502 is 20500408387.

It is a super-2 number, since 2×78380400502² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318618 + ... + 508210.

It is an arithmetic number, because the mean of its divisors is an integer number (7427439747).

Almost surely, 2^78380400502 is an apocalyptic number.

78380400502 is a deficient number, since it is larger than the sum of its proper divisors (40458635450).

78380400502 is a wasteful number, since it uses less digits than its factorization.

78380400502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191823.

The product of its (nonzero) digits is 53760, while the sum is 37.

Adding to 78380400502 its reverse (20500408387), we get a palindrome (98880808889).

The spelling of 78380400502 in words is "seventy-eight billion, three hundred eighty million, four hundred thousand, five hundred two".