77268716639 has 8 divisors (see below), whose sum is σ = 77449070160. Its totient is φ = 77088419200.

The previous prime is 77268716627. The next prime is 77268716671. The reversal of 77268716639 is 93661786277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77268716639 - 2⁸ = 77268716383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77268716939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4158632 + ... + 4177170.

It is an arithmetic number, because the mean of its divisors is an integer number (9681133770).

Almost surely, 2^77268716639 is an apocalyptic number.

77268716639 is a deficient number, since it is larger than the sum of its proper divisors (180353521).

77268716639 is a wasteful number, since it uses less digits than its factorization.

77268716639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28041.

The product of its digits is 32006016, while the sum is 62.

The spelling of 77268716639 in words is "seventy-seven billion, two hundred sixty-eight million, seven hundred sixteen thousand, six hundred thirty-nine".