77693847016 has 8 divisors (see below), whose sum is σ = 145675963170. Its totient is φ = 38846923504.

The previous prime is 77693847001. The next prime is 77693847037. The reversal of 77693847016 is 61074839677.

It can be written as a sum of positive squares in only one way, i.e., 69764656900 + 7929190116 = 264130^2 + 89046^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×77693847016² (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, 4855865431 + ... + 4855865446.

Almost surely, 2^77693847016 is an apocalyptic number.

It is an amenable number.

77693847016 is a deficient number, since it is larger than the sum of its proper divisors (67982116154).

77693847016 is a wasteful number, since it uses less digits than its factorization.

77693847016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9711730883 (or 9711730879 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 77693847016 in words is "seventy-seven billion, six hundred ninety-three million, eight hundred forty-seven thousand, sixteen".