77771097790 has 32 divisors (see below), whose sum is σ = 145829502720. Its totient is φ = 29828736000.

The previous prime is 77771097779. The next prime is 77771097791. The reversal of 77771097790 is 9779017777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77771097791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117011 + ... + 1184590.

It is an arithmetic number, because the mean of its divisors is an integer number (4557171960).

Almost surely, 2^77771097790 is an apocalyptic number.

77771097790 is a deficient number, since it is larger than the sum of its proper divisors (68058404930).

77771097790 is a wasteful number, since it uses less digits than its factorization.

77771097790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301748.

The product of its (nonzero) digits is 9529569, while the sum is 61.

The spelling of 77771097790 in words is "seventy-seven billion, seven hundred seventy-one million, ninety-seven thousand, seven hundred ninety".