77730474185816 has 32 divisors (see below), whose sum is σ = 145778071496400. Its totient is φ = 38856322753920.

The previous prime is 77730474185789. The next prime is 77730474185821. The reversal of 77730474185816 is 61858147403777.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781404530 + ... + 781503998.

Almost surely, 2^{77730474185816} is an apocalyptic number.

It is an amenable number.

77730474185816 is a deficient number, since it is larger than the sum of its proper divisors (68047597310584).

77730474185816 is a wasteful number, since it uses less digits than its factorization.

77730474185816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120899 (or 120895 counting only the distinct ones).

The product of its (nonzero) digits is 221276160, while the sum is 68.

The spelling of 77730474185816 in words is "seventy-seven trillion, seven hundred thirty billion, four hundred seventy-four million, one hundred eighty-five thousand, eight hundred sixteen".