77925217194 has 48 divisors (see below), whose sum is σ = 185112532800. Its totient is φ = 23495028480.

The previous prime is 77925217177. The next prime is 77925217213. The reversal of 77925217194 is 49171252977.

It is a self number, because there is not a number n which added to its sum of digits gives 77925217194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 949447 + ... + 1028250.

It is an arithmetic number, because the mean of its divisors is an integer number (3856511100).

Almost surely, 2^77925217194 is an apocalyptic number.

77925217194 is an abundant number, since it is smaller than the sum of its proper divisors (107187315606).

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

77925217194 is a wasteful number, since it uses less digits than its factorization.

77925217194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977915 (or 1977912 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The spelling of 77925217194 in words is "seventy-seven billion, nine hundred twenty-five million, two hundred seventeen thousand, one hundred ninety-four".