77902868198 has 16 divisors (see below), whose sum is σ = 124529287680. Its totient is φ = 36465171336.

The previous prime is 77902868191. The next prime is 77902868207. The reversal of 77902868198 is 89186820977.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77902868191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18014228 + ... + 18018551.

It is an arithmetic number, because the mean of its divisors is an integer number (7783080480).

Almost surely, 2^77902868198 is an apocalyptic number.

77902868198 is a deficient number, since it is larger than the sum of its proper divisors (46626419482).

77902868198 is a wasteful number, since it uses less digits than its factorization.

77902868198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36032851.

The product of its (nonzero) digits is 24385536, while the sum is 65.

The spelling of 77902868198 in words is "seventy-seven billion, nine hundred two million, eight hundred sixty-eight thousand, one hundred ninety-eight".