76772815769 has 8 divisors (see below), whose sum is σ = 82680690120. Its totient is φ = 70865266176.

The previous prime is 76772815727. The next prime is 76772815787. The reversal of 76772815769 is 96751827767.

It can be written as a sum of positive squares in 4 ways, for example, as 7816681744 + 68956134025 = 88412^2 + 262595^2 .

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 76772815769 - 2²⁸ = 76504380313 is a prime.

It is a super-2 number, since 2×76772815769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76772815069) 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, 661439 + ... + 768795.

It is an arithmetic number, because the mean of its divisors is an integer number (10335086265).

Almost surely, 2^76772815769 is an apocalyptic number.

It is an amenable number.

76772815769 is a deficient number, since it is larger than the sum of its proper divisors (5907874351).

76772815769 is a wasteful number, since it uses less digits than its factorization.

76772815769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162379.

The product of its digits is 62233920, while the sum is 65.

The spelling of 76772815769 in words is "seventy-six billion, seven hundred seventy-two million, eight hundred fifteen thousand, seven hundred sixty-nine".