77964912198 has 12 divisors (see below), whose sum is σ = 168923976468. Its totient is φ = 25988304060.

The previous prime is 77964912167. The next prime is 77964912209. The reversal of 77964912198 is 89121946977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2165691988 + ... + 2165692023.

It is an arithmetic number, because the mean of its divisors is an integer number (14076998039).

Almost surely, 2^77964912198 is an apocalyptic number.

77964912198 is an abundant number, since it is smaller than the sum of its proper divisors (90959064270).

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

77964912198 is a wasteful number, since it uses less digits than its factorization.

77964912198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331384019 (or 4331384016 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The spelling of 77964912198 in words is "seventy-seven billion, nine hundred sixty-four million, nine hundred twelve thousand, one hundred ninety-eight".