77800187265012 has 72 divisors (see below), whose sum is σ = 202356063884520. Its totient is φ = 25192164691200.

The previous prime is 77800187265011. The next prime is 77800187265013. The reversal of 77800187265012 is 21056278100877.

It is an interprime number because it is at equal distance from previous prime (77800187265011) and next prime (77800187265013).

It can be written as a sum of positive squares in 4 ways, for example, as 45488738877156 + 32311448387856 = 6744534^2 + 5684316^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77800187265012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77800187265011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201667587 + ... + 202053002.

It is an arithmetic number, because the mean of its divisors is an integer number (2810500887285).

Almost surely, 2^{77800187265012} is an apocalyptic number.

It is an amenable number.

77800187265012 is an abundant number, since it is smaller than the sum of its proper divisors (124555876619508).

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

77800187265012 is a wasteful number, since it uses less digits than its factorization.

77800187265012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403720753 (or 403720748 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 54.

The spelling of 77800187265012 in words is "seventy-seven trillion, eight hundred billion, one hundred eighty-seven million, two hundred sixty-five thousand, twelve".