77800188705825 has 24 divisors (see below), whose sum is σ = 128761303222368. Its totient is φ = 41450963687680.

The previous prime is 77800188705797. The next prime is 77800188705839. The reversal of 77800188705825 is 52850788100877.

It is not a de Polignac number, because 77800188705825 - 2²¹ = 77800186608673 is a prime.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 530804847 + ... + 530951396.

It is an arithmetic number, because the mean of its divisors is an integer number (5365054300932).

Almost surely, 2^{77800188705825} is an apocalyptic number.

77800188705825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77800188705825 is a deficient number, since it is larger than the sum of its proper divisors (50961114516543).

77800188705825 is a wasteful number, since it uses less digits than its factorization.

77800188705825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061757233 (or 1061757228 counting only the distinct ones).

The product of its (nonzero) digits is 70246400, while the sum is 66.

The spelling of 77800188705825 in words is "seventy-seven trillion, eight hundred billion, one hundred eighty-eight million, seven hundred five thousand, eight hundred twenty-five".