77793016842 has 32 divisors (see below), whose sum is σ = 174018245760. Its totient is φ = 25759274400.

The previous prime is 77793016811. The next prime is 77793016859. The reversal of 77793016842 is 24861039777.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4762083 + ... + 4778390.

It is an arithmetic number, because the mean of its divisors is an integer number (5438070180).

Almost surely, 2^77793016842 is an apocalyptic number.

77793016842 is an abundant number, since it is smaller than the sum of its proper divisors (96225228918).

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

77793016842 is a wasteful number, since it uses less digits than its factorization.

77793016842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9540635 (or 9540629 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 77793016842 in words is "seventy-seven billion, seven hundred ninety-three million, sixteen thousand, eight hundred forty-two".