77613503780 has 12 divisors (see below), whose sum is σ = 162988357980. Its totient is φ = 31045401504.

The previous prime is 77613503771. The next prime is 77613503813. The reversal of 77613503780 is 8730531677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60292838116 + 17320665664 = 245546^2 + 131608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940337575 + ... + 1940337614.

It is an arithmetic number, because the mean of its divisors is an integer number (13582363165).

Almost surely, 2^77613503780 is an apocalyptic number.

It is an amenable number.

77613503780 is an abundant number, since it is smaller than the sum of its proper divisors (85374854200).

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

77613503780 is a wasteful number, since it uses less digits than its factorization.

77613503780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880675198 (or 3880675196 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 77613503780 in words is "seventy-seven billion, six hundred thirteen million, five hundred three thousand, seven hundred eighty".