78565136552474 has 24 divisors (see below), whose sum is σ = 139499317482420. Its totient is φ = 32964392957760.

The previous prime is 78565136552407. The next prime is 78565136552477. The reversal of 78565136552474 is 47425563156587.

78565136552474 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 2 ways, for example, as 75198120739225 + 3367015813249 = 8671685^2 + 1834943^2 .

It is not an unprimeable number, because it can be changed into a prime (78565136552477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12486509339 + ... + 12486515630.

Almost surely, 2^{78565136552474} is an apocalyptic number.

78565136552474 is a deficient number, since it is larger than the sum of its proper divisors (60934180929946).

78565136552474 is a wasteful number, since it uses less digits than its factorization.

78565136552474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24973025006 (or 24973024995 counting only the distinct ones).

The product of its digits is 846720000, while the sum is 68.

The spelling of 78565136552474 in words is "seventy-eight trillion, five hundred sixty-five billion, one hundred thirty-six million, five hundred fifty-two thousand, four hundred seventy-four".