77912712906 has 16 divisors (see below), whose sum is σ = 178086201024. Its totient is φ = 22260775104.

The previous prime is 77912712887. The next prime is 77912712907. The reversal of 77912712906 is 60921721977.

It is not an unprimeable number, because it can be changed into a prime (77912712907) by changing a digit.

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, 927532255 + ... + 927532338.

It is an arithmetic number, because the mean of its divisors is an integer number (11130387564).

Almost surely, 2^77912712906 is an apocalyptic number.

77912712906 is an abundant number, since it is smaller than the sum of its proper divisors (100173488118).

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

77912712906 is a wasteful number, since it uses less digits than its factorization.

77912712906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855064605.

The product of its (nonzero) digits is 666792, while the sum is 51.

The spelling of 77912712906 in words is "seventy-seven billion, nine hundred twelve million, seven hundred twelve thousand, nine hundred six".