76647779623 has 16 divisors (see below), whose sum is σ = 82835511840. Its totient is φ = 70661764096.

The previous prime is 76647779617. The next prime is 76647779627. The reversal of 76647779623 is 32697774667.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76647779623 is a prime.

It is a super-2 number, since 2×76647779623² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76647779627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74836 + ... + 398617.

It is an arithmetic number, because the mean of its divisors is an integer number (5177219490).

Almost surely, 2^76647779623 is an apocalyptic number.

76647779623 is a deficient number, since it is larger than the sum of its proper divisors (6187732217).

76647779623 is a wasteful number, since it uses less digits than its factorization.

76647779623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473666.

The product of its digits is 112021056, while the sum is 64.

The spelling of 76647779623 in words is "seventy-six billion, six hundred forty-seven million, seven hundred seventy-nine thousand, six hundred twenty-three".