77870775792 has 80 divisors (see below), whose sum is σ = 210854504448. Its totient is φ = 24716947200.

The previous prime is 77870775737. The next prime is 77870775839. The reversal of 77870775792 is 29757707877.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88042 + ... + 404342.

Almost surely, 2^77870775792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77870775792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105427252224).

77870775792 is an abundant number, since it is smaller than the sum of its proper divisors (132983728656).

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

77870775792 is a wasteful number, since it uses less digits than its factorization.

77870775792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316558 (or 316552 counting only the distinct ones).

The product of its (nonzero) digits is 84707280, while the sum is 66.

The spelling of 77870775792 in words is "seventy-seven billion, eight hundred seventy million, seven hundred seventy-five thousand, seven hundred ninety-two".