77349085872 has 20 divisors (see below), whose sum is σ = 199818471960. Its totient is φ = 25783028608.

The previous prime is 77349085843. The next prime is 77349085907. The reversal of 77349085872 is 27858094377.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805719597 + ... + 805719692.

It is an arithmetic number, because the mean of its divisors is an integer number (9990923598).

Almost surely, 2^77349085872 is an apocalyptic number.

It is an amenable number.

77349085872 is an abundant number, since it is smaller than the sum of its proper divisors (122469386088).

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

77349085872 is a wasteful number, since it uses less digits than its factorization.

77349085872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611439300 (or 1611439294 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 60.

The spelling of 77349085872 in words is "seventy-seven billion, three hundred forty-nine million, eighty-five thousand, eight hundred seventy-two".