77905539975 has 12 divisors (see below), whose sum is σ = 128803826216. Its totient is φ = 41549621280.

The previous prime is 77905539919. The next prime is 77905539983. The reversal of 77905539975 is 57993550977.

It is not a de Polignac number, because 77905539975 - 2⁹ = 77905539463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 519370192 + ... + 519370341.

Almost surely, 2^77905539975 is an apocalyptic number.

77905539975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

77905539975 is a deficient number, since it is larger than the sum of its proper divisors (50898286241).

77905539975 is a wasteful number, since it uses less digits than its factorization.

77905539975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038740546 (or 1038740541 counting only the distinct ones).

The product of its (nonzero) digits is 93767625, while the sum is 66.

The spelling of 77905539975 in words is "seventy-seven billion, nine hundred five million, five hundred thirty-nine thousand, nine hundred seventy-five".