77635681316 has 6 divisors (see below), whose sum is σ = 135862442310. Its totient is φ = 38817840656.

The previous prime is 77635681303. The next prime is 77635681339. The reversal of 77635681316 is 61318653677.

It can be written as a sum of positive squares in only one way, i.e., 48717318400 + 28918362916 = 220720^2 + 170054^2 .

It is a super-2 number, since 2×77635681316² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9704460161 + ... + 9704460168.

It is an arithmetic number, because the mean of its divisors is an integer number (22643740385).

Almost surely, 2^77635681316 is an apocalyptic number.

It is an amenable number.

77635681316 is a deficient number, since it is larger than the sum of its proper divisors (58226760994).

77635681316 is a wasteful number, since it uses less digits than its factorization.

77635681316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19408920333 (or 19408920331 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 53.

The spelling of 77635681316 in words is "seventy-seven billion, six hundred thirty-five million, six hundred eighty-one thousand, three hundred sixteen".