42512385978 has 16 divisors (see below), whose sum is σ = 94471968960. Its totient is φ = 14170795308.

The previous prime is 42512385953. The next prime is 42512386027. The reversal of 42512385978 is 87958321524.

42512385978 is a `hidden beast` number, since 4 + 2 + 5 + 12 + 38 + 597 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 787266407 = 42512385978 / (4 + 2 + 5 + 1 + 2 + 3 + 8 + 5 + 9 + 7 + 8).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 393633150 + ... + 393633257.

It is an arithmetic number, because the mean of its divisors is an integer number (5904498060).

Almost surely, 2^42512385978 is an apocalyptic number.

42512385978 is an abundant number, since it is smaller than the sum of its proper divisors (51959582982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42512385978 is a wasteful number, since it uses less digits than its factorization.

42512385978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787266418 (or 787266412 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 42512385978 in words is "forty-two billion, five hundred twelve million, three hundred eighty-five thousand, nine hundred seventy-eight".