77613063760 has 20 divisors (see below), whose sum is σ = 180450373428. Its totient is φ = 31045225472.

The previous prime is 77613063743. The next prime is 77613063761. The reversal of 77613063760 is 6736031677.

It can be written as a sum of positive squares in 2 ways, for example, as 41418762256 + 36194301504 = 203516^2 + 190248^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 77613063760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77613063761) 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, 485081569 + ... + 485081728.

Almost surely, 2^77613063760 is an apocalyptic number.

It is an amenable number.

77613063760 is an abundant number, since it is smaller than the sum of its proper divisors (102837309668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77613063760 is a wasteful number, since it uses less digits than its factorization.

77613063760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970163310 (or 970163304 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 46.

The spelling of 77613063760 in words is "seventy-seven billion, six hundred thirteen million, sixty-three thousand, seven hundred sixty".