76438266978 has 8 divisors (see below), whose sum is σ = 152876533968. Its totient is φ = 25479422324.

The previous prime is 76438266943. The next prime is 76438266979. The reversal of 76438266978 is 87966283467.

It is a sphenic number, since it is the product of 3 distinct primes.

76438266978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (76438266979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6369855576 + ... + 6369855587.

It is an arithmetic number, because the mean of its divisors is an integer number (19109566746).

Almost surely, 2^76438266978 is an apocalyptic number.

76438266978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

76438266978 is a wasteful number, since it uses less digits than its factorization.

76438266978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12739711168.

The product of its digits is 146313216, while the sum is 66.

The spelling of 76438266978 in words is "seventy-six billion, four hundred thirty-eight million, two hundred sixty-six thousand, nine hundred seventy-eight".