77764011577165 has 4 divisors (see below), whose sum is σ = 93316813892604. Its totient is φ = 62211209261728.

The previous prime is 77764011577127. The next prime is 77764011577169. The reversal of 77764011577165 is 56177511046777.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42171165808489 + 35592845768676 = 6493933^2 + 5965974^2 .

It is a cyclic number.

It is not a de Polignac number, because 77764011577165 - 2⁷ = 77764011577037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77764011577097 and 77764011577106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77764011577169) 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, 7776401157712 + ... + 7776401157721.

It is an arithmetic number, because the mean of its divisors is an integer number (23329203473151).

Almost surely, 2^{77764011577165} is an apocalyptic number.

It is an amenable number.

77764011577165 is a deficient number, since it is larger than the sum of its proper divisors (15552802315439).

77764011577165 is a wasteful number, since it uses less digits than its factorization.

77764011577165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15552802315438.

The product of its (nonzero) digits is 60505200, while the sum is 64.

The spelling of 77764011577165 in words is "seventy-seven trillion, seven hundred sixty-four billion, eleven million, five hundred seventy-seven thousand, one hundred sixty-five".