77189474964 has 96 divisors (see below), whose sum is σ = 212596151040. Its totient is φ = 21341518848.

The previous prime is 77189474959. The next prime is 77189474977. The reversal of 77189474964 is 46947498177.

It is a junction number, because it is equal to n+sod(n) for n = 77189474895 and 77189474904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206242 + ... + 443750.

It is an arithmetic number, because the mean of its divisors is an integer number (2214543240).

Almost surely, 2^77189474964 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 77189474964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106298075520).

77189474964 is an abundant number, since it is smaller than the sum of its proper divisors (135406676076).

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

77189474964 is a wasteful number, since it uses less digits than its factorization.

77189474964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237649 (or 237647 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 66.

The spelling of 77189474964 in words is "seventy-seven billion, one hundred eighty-nine million, four hundred seventy-four thousand, nine hundred sixty-four".