77368817725 has 12 divisors (see below), whose sum is σ = 101580707124. Its totient is φ = 58254168320.

The previous prime is 77368817723. The next prime is 77368817749. The reversal of 77368817725 is 52771886377.

It can be written as a sum of positive squares in 6 ways, for example, as 9471571684 + 67897246041 = 97322^2 + 260571^2 .

It is not a de Polignac number, because 77368817725 - 2¹ = 77368817723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77368817723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91021714 + ... + 91022563.

It is an arithmetic number, because the mean of its divisors is an integer number (8465058927).

Almost surely, 2^77368817725 is an apocalyptic number.

It is an amenable number.

77368817725 is a deficient number, since it is larger than the sum of its proper divisors (24211889399).

77368817725 is a wasteful number, since it uses less digits than its factorization.

77368817725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182044304 (or 182044299 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 61.

The spelling of 77368817725 in words is "seventy-seven billion, three hundred sixty-eight million, eight hundred seventeen thousand, seven hundred twenty-five".