77118400804 has 27 divisors (see below), whose sum is σ = 141103396497. Its totient is φ = 36876603984.

The previous prime is 77118400759. The next prime is 77118400837. The reversal of 77118400804 is 40800481177.

The square root of 77118400804 is 277702.

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., 15141302500 + 61977098304 = 123050^2 + 248952^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12771274 + ... + 12777310.

Almost surely, 2^77118400804 is an apocalyptic number.

77118400804 is the 277702-nd square number.

It is an amenable number.

77118400804 is a deficient number, since it is larger than the sum of its proper divisors (63984995693).

77118400804 is an frugal number, since it uses more digits than its factorization.

77118400804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12124 (or 6062 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The spelling of 77118400804 in words is "seventy-seven billion, one hundred eighteen million, four hundred thousand, eight hundred four".