77712428568012 has 48 divisors (see below), whose sum is σ = 213918082947072. Its totient is φ = 21487307437440.

The previous prime is 77712428567989. The next prime is 77712428568029. The reversal of 77712428568012 is 21086582421777.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14921738673 + ... + 14921743880.

It is an arithmetic number, because the mean of its divisors is an integer number (4456626728064).

Almost surely, 2^{77712428568012} is an apocalyptic number.

It is an amenable number.

77712428568012 is an abundant number, since it is smaller than the sum of its proper divisors (136205654379060).

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

77712428568012 is a wasteful number, since it uses less digits than its factorization.

77712428568012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29843482598 (or 29843482596 counting only the distinct ones).

The product of its (nonzero) digits is 21073920, while the sum is 60.

The spelling of 77712428568012 in words is "seventy-seven trillion, seven hundred twelve billion, four hundred twenty-eight million, five hundred sixty-eight thousand, twelve".