76643279408 has 40 divisors (see below), whose sum is σ = 159140656608. Its totient is φ = 35664786432.

The previous prime is 76643279351. The next prime is 76643279441. The reversal of 76643279408 is 80497234667.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2800841 + ... + 2828072.

Almost surely, 2^76643279408 is an apocalyptic number.

It is an amenable number.

76643279408 is an abundant number, since it is smaller than the sum of its proper divisors (82497377200).

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

76643279408 is a wasteful number, since it uses less digits than its factorization.

76643279408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628981 (or 5628975 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 76643279408 in words is "seventy-six billion, six hundred forty-three million, two hundred seventy-nine thousand, four hundred eight".