77365769699 has 4 divisors (see below), whose sum is σ = 77366374536. Its totient is φ = 77365164864.

The previous prime is 77365769651. The next prime is 77365769711. The reversal of 77365769699 is 99696756377.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99696756377 = 17 ⋅5864515081.

It is a cyclic number.

It is not a de Polignac number, because 77365769699 - 2⁸ = 77365769443 is a prime.

It is a super-2 number, since 2×77365769699² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77365769399) 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, 26849 + ... + 394274.

It is an arithmetic number, because the mean of its divisors is an integer number (19341593634).

Almost surely, 2^77365769699 is an apocalyptic number.

77365769699 is a deficient number, since it is larger than the sum of its proper divisors (604837).

77365769699 is a wasteful number, since it uses less digits than its factorization.

77365769699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604836.

The product of its digits is 810152280, while the sum is 74.

The spelling of 77365769699 in words is "seventy-seven billion, three hundred sixty-five million, seven hundred sixty-nine thousand, six hundred ninety-nine".