77901871236 has 48 divisors (see below), whose sum is σ = 210072481920. Its totient is φ = 22007589120.

The previous prime is 77901871219. The next prime is 77901871261. The reversal of 77901871236 is 63217810977.

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, 5202655 + ... + 5217606.

It is an arithmetic number, because the mean of its divisors is an integer number (4376510040).

Almost surely, 2^77901871236 is an apocalyptic number.

It is an amenable number.

77901871236 is an abundant number, since it is smaller than the sum of its proper divisors (132170610684).

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

77901871236 is a wasteful number, since it uses less digits than its factorization.

77901871236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10420364 (or 10420362 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 77901871236 in words is "seventy-seven billion, nine hundred one million, eight hundred seventy-one thousand, two hundred thirty-six".