77772077792 has 12 divisors (see below), whose sum is σ = 153113778216. Its totient is φ = 38886038880.

The previous prime is 77772077791. The next prime is 77772077861. The reversal of 77772077792 is 29777027777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77772077791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215188684 + ... + 1215188747.

It is an arithmetic number, because the mean of its divisors is an integer number (12759481518).

Almost surely, 2^77772077792 is an apocalyptic number.

It is an amenable number.

77772077792 is a deficient number, since it is larger than the sum of its proper divisors (75341700424).

77772077792 is a wasteful number, since it uses less digits than its factorization.

77772077792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430377441 (or 2430377433 counting only the distinct ones).

The product of its (nonzero) digits is 29647548, while the sum is 62.

The spelling of 77772077792 in words is "seventy-seven billion, seven hundred seventy-two million, seventy-seven thousand, seven hundred ninety-two".