776507164465 has 4 divisors (see below), whose sum is σ = 931808597364. Its totient is φ = 621205731568.

The previous prime is 776507164439. The next prime is 776507164471. The reversal of 776507164465 is 564461705677.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564461705677 = 164093 ⋅3439889.

It can be written as a sum of positive squares in 2 ways, for example, as 292180248369 + 484326916096 = 540537^2 + 695936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-776507164465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77650716442 + ... + 77650716451.

It is an arithmetic number, because the mean of its divisors is an integer number (232952149341).

Almost surely, 2^776507164465 is an apocalyptic number.

It is an amenable number.

776507164465 is a deficient number, since it is larger than the sum of its proper divisors (155301432899).

776507164465 is a wasteful number, since it uses less digits than its factorization.

776507164465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155301432898.

The product of its (nonzero) digits is 29635200, while the sum is 58.

The spelling of 776507164465 in words is "seven hundred seventy-six billion, five hundred seven million, one hundred sixty-four thousand, four hundred sixty-five".