68878400547 has 16 divisors (see below), whose sum is σ = 100695336192. Its totient is φ = 41532580320.

The previous prime is 68878400537. The next prime is 68878400551. The reversal of 68878400547 is 74500487886.

It is a happy number.

It is not a de Polignac number, because 68878400547 - 2⁷ = 68878400419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68878400537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5291023 + ... + 5304024.

It is an arithmetic number, because the mean of its divisors is an integer number (6293458512).

Almost surely, 2^68878400547 is an apocalyptic number.

68878400547 is a deficient number, since it is larger than the sum of its proper divisors (31816935645).

68878400547 is a wasteful number, since it uses less digits than its factorization.

68878400547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10595258.

The product of its (nonzero) digits is 12042240, while the sum is 57.

The spelling of 68878400547 in words is "sixty-eight billion, eight hundred seventy-eight million, four hundred thousand, five hundred forty-seven".