77885508576 has 48 divisors (see below), whose sum is σ = 207801106128. Its totient is φ = 25536230400.

The previous prime is 77885508553. The next prime is 77885508593. The reversal of 77885508576 is 67580558877.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×77885508576² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 6644205 + ... + 6655916.

It is an arithmetic number, because the mean of its divisors is an integer number (4329189711).

Almost surely, 2^77885508576 is an apocalyptic number.

It is an amenable number.

77885508576 is an abundant number, since it is smaller than the sum of its proper divisors (129915597552).

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

77885508576 is a wasteful number, since it uses less digits than its factorization.

77885508576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13300195 (or 13300187 counting only the distinct ones).

The product of its (nonzero) digits is 131712000, while the sum is 66.

The spelling of 77885508576 in words is "seventy-seven billion, eight hundred eighty-five million, five hundred eight thousand, five hundred seventy-six".