77164752377 has 4 divisors (see below), whose sum is σ = 81703855476. Its totient is φ = 72625649280.

The previous prime is 77164752331. The next prime is 77164752403. The reversal of 77164752377 is 77325746177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77325746177 = 97 ⋅797172641.

It can be written as a sum of positive squares in 2 ways, for example, as 64713763321 + 12450989056 = 254389^2 + 111584^2 .

It is a cyclic number.

It is not a de Polignac number, because 77164752377 - 2¹⁰ = 77164751353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77169752377) 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, 2269551524 + ... + 2269551557.

It is an arithmetic number, because the mean of its divisors is an integer number (20425963869).

Almost surely, 2^77164752377 is an apocalyptic number.

It is an amenable number.

77164752377 is a deficient number, since it is larger than the sum of its proper divisors (4539103099).

77164752377 is a wasteful number, since it uses less digits than its factorization.

77164752377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539103098.

The product of its digits is 12101040, while the sum is 56.

The spelling of 77164752377 in words is "seventy-seven billion, one hundred sixty-four million, seven hundred fifty-two thousand, three hundred seventy-seven".