77720045524 has 12 divisors (see below), whose sum is σ = 148374632448. Its totient is φ = 35327293400.

The previous prime is 77720045521. The next prime is 77720045537. The reversal of 77720045524 is 42554002777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77720045521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883182292 + ... + 883182379.

It is an arithmetic number, because the mean of its divisors is an integer number (12364552704).

Almost surely, 2^77720045524 is an apocalyptic number.

It is an amenable number.

77720045524 is a deficient number, since it is larger than the sum of its proper divisors (70654586924).

77720045524 is a wasteful number, since it uses less digits than its factorization.

77720045524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766364686 (or 1766364684 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 43.

The spelling of 77720045524 in words is "seventy-seven billion, seven hundred twenty million, forty-five thousand, five hundred twenty-four".