77901885412 has 24 divisors (see below), whose sum is σ = 146929116600. Its totient is φ = 35926791936.

The previous prime is 77901885409. The next prime is 77901885463. The reversal of 77901885412 is 21458810977.

It can be written as a sum of positive squares in 4 ways, for example, as 11860081216 + 66041804196 = 108904^2 + 256986^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 77901885412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514087 + ... + 648142.

It is an arithmetic number, because the mean of its divisors is an integer number (6122046525).

Almost surely, 2^77901885412 is an apocalyptic number.

It is an amenable number.

77901885412 is a deficient number, since it is larger than the sum of its proper divisors (69027231188).

77901885412 is a wasteful number, since it uses less digits than its factorization.

77901885412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163535 (or 1163533 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 77901885412 in words is "seventy-seven billion, nine hundred one million, eight hundred eighty-five thousand, four hundred twelve".