78620795236 has 9 divisors (see below), whose sum is σ = 137587373049. Its totient is φ = 39310117224.

The previous prime is 78620795159. The next prime is 78620795261. The reversal of 78620795236 is 63259702687.

The square root of 78620795236 is 280394.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 65244484900 + 13376310336 = 255430^2 + 115656^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 490690 + ... + 630886.

Almost surely, 2^78620795236 is an apocalyptic number.

78620795236 is the 280394-th square number.

It is an amenable number.

78620795236 is a deficient number, since it is larger than the sum of its proper divisors (58966577813).

78620795236 is an frugal number, since it uses more digits than its factorization.

78620795236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280398 (or 140199 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 78620795236 in words is "seventy-eight billion, six hundred twenty million, seven hundred ninety-five thousand, two hundred thirty-six".