77913544975 has 24 divisors (see below), whose sum is σ = 110616614528. Its totient is φ = 53328693600.

The previous prime is 77913544963. The next prime is 77913545029. The reversal of 77913544975 is 57944531977.

It is not a de Polignac number, because 77913544975 - 2²³ = 77905156367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311241 + ... + 502690.

Almost surely, 2^77913544975 is an apocalyptic number.

77913544975 is a deficient number, since it is larger than the sum of its proper divisors (32703069553).

77913544975 is a wasteful number, since it uses less digits than its factorization.

77913544975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814495 (or 814490 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 61.

The spelling of 77913544975 in words is "seventy-seven billion, nine hundred thirteen million, five hundred forty-four thousand, nine hundred seventy-five".