78773596625 has 24 divisors (see below), whose sum is σ = 100990931496. Its totient is φ = 61300807200.

The previous prime is 78773596619. The next prime is 78773596663. The reversal of 78773596625 is 52669537787.

It can be written as a sum of positive squares in 4 ways, for example, as 17032129 + 78756564496 = 4127^2 + 280636^2 .

It is not a de Polignac number, because 78773596625 - 2¹⁰ = 78773595601 is a prime.

It is a super-2 number, since 2×78773596625² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19085312 + ... + 19089438.

It is an arithmetic number, because the mean of its divisors is an integer number (4207955479).

Almost surely, 2^78773596625 is an apocalyptic number.

It is an amenable number.

78773596625 is a deficient number, since it is larger than the sum of its proper divisors (22217334871).

78773596625 is an frugal number, since it uses more digits than its factorization.

78773596625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8306 (or 4169 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 65.

The spelling of 78773596625 in words is "seventy-eight billion, seven hundred seventy-three million, five hundred ninety-six thousand, six hundred twenty-five".