12778874475 has 48 divisors (see below), whose sum is σ = 21488466912. Its totient is φ = 6699663360.

The previous prime is 12778874443. The next prime is 12778874501. The reversal of 12778874475 is 57447887721.

It is a happy number.

It is not a de Polignac number, because 12778874475 - 2⁵ = 12778874443 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1709947 + ... + 1717403.

It is an arithmetic number, because the mean of its divisors is an integer number (447676394).

Almost surely, 2^12778874475 is an apocalyptic number.

12778874475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12778874475 is a deficient number, since it is larger than the sum of its proper divisors (8709592437).

12778874475 is a wasteful number, since it uses less digits than its factorization.

12778874475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7856 (or 7851 counting only the distinct ones).

The product of its digits is 24586240, while the sum is 60.

The spelling of 12778874475 in words is "twelve billion, seven hundred seventy-eight million, eight hundred seventy-four thousand, four hundred seventy-five".