77618730988 has 6 divisors (see below), whose sum is σ = 135832779236. Its totient is φ = 38809365492.

The previous prime is 77618730983. The next prime is 77618731013. The reversal of 77618730988 is 88903781677.

It is a super-2 number, since 2×77618730988² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77618730983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9702341370 + ... + 9702341377.

Almost surely, 2^77618730988 is an apocalyptic number.

It is an amenable number.

77618730988 is a deficient number, since it is larger than the sum of its proper divisors (58214048248).

77618730988 is a wasteful number, since it uses less digits than its factorization.

77618730988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19404682751 (or 19404682749 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 77618730988 in words is "seventy-seven billion, six hundred eighteen million, seven hundred thirty thousand, nine hundred eighty-eight".