77888995396 has 27 divisors (see below), whose sum is σ = 139314491869. Its totient is φ = 38103053408.

The previous prime is 77888995391. The next prime is 77888995423. The reversal of 77888995396 is 69359988877.

The square root of 77888995396 is 279086.

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., 471497796 + 77417497600 = 21714^2 + 278240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77888995391) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26232600 + ... + 26235568.

Almost surely, 2^77888995396 is an apocalyptic number.

77888995396 is the 279086-th square number.

It is an amenable number.

77888995396 is a deficient number, since it is larger than the sum of its proper divisors (61425496473).

77888995396 is an frugal number, since it uses more digits than its factorization.

77888995396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036 (or 3018 counting only the distinct ones).

The product of its digits is 1646023680, while the sum is 79.

The spelling of 77888995396 in words is "seventy-seven billion, eight hundred eighty-eight million, nine hundred ninety-five thousand, three hundred ninety-six".