77647036699 has 4 divisors (see below), whose sum is σ = 82214509464. Its totient is φ = 73079563936.

The previous prime is 77647036681. The next prime is 77647036759. The reversal of 77647036699 is 99663074677.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77647036699 - 2¹⁷ = 77646905627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77647036699.

It is not an unprimeable number, because it can be changed into a prime (77647036619) 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, 2283736357 + ... + 2283736390.

It is an arithmetic number, because the mean of its divisors is an integer number (20553627366).

Almost surely, 2^77647036699 is an apocalyptic number.

77647036699 is a deficient number, since it is larger than the sum of its proper divisors (4567472765).

77647036699 is a wasteful number, since it uses less digits than its factorization.

77647036699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4567472764.

The product of its (nonzero) digits is 72013536, while the sum is 64.

The spelling of 77647036699 in words is "seventy-seven billion, six hundred forty-seven million, thirty-six thousand, six hundred ninety-nine".