77900202011212 has 12 divisors (see below), whose sum is σ = 155800404022480. Its totient is φ = 33385800861936.

The previous prime is 77900202011183. The next prime is 77900202011221. The reversal of 77900202011212 is 21211020200977.

77900202011212 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391075035887 + ... + 1391075035942.

Almost surely, 2^{77900202011212} is an apocalyptic number.

It is an amenable number.

77900202011212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77900202011212 is a wasteful number, since it uses less digits than its factorization.

77900202011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782150071840 (or 2782150071838 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 77900202011212 in words is "seventy-seven trillion, nine hundred billion, two hundred two million, eleven thousand, two hundred twelve".