77873360525 has 6 divisors (see below), whose sum is σ = 96562967082. Its totient is φ = 62298688400.

The previous prime is 77873360507. The next prime is 77873360533. The reversal of 77873360525 is 52506337877.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3076033444 + 74797327081 = 55462^2 + 273491^2 .

It is not a de Polignac number, because 77873360525 - 2²⁰ = 77872311949 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1557467186 + ... + 1557467235.

It is an arithmetic number, because the mean of its divisors is an integer number (16093827847).

Almost surely, 2^77873360525 is an apocalyptic number.

It is an amenable number.

77873360525 is a deficient number, since it is larger than the sum of its proper divisors (18689606557).

77873360525 is a wasteful number, since it uses less digits than its factorization.

77873360525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114934431 (or 3114934426 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 77873360525 in words is "seventy-seven billion, eight hundred seventy-three million, three hundred sixty thousand, five hundred twenty-five".