77161645315 has 4 divisors (see below), whose sum is σ = 92593974384. Its totient is φ = 61729316248.

The previous prime is 77161645307. The next prime is 77161645343. The reversal of 77161645315 is 51354616177.

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

It is a cyclic number.

It is not a de Polignac number, because 77161645315 - 2³ = 77161645307 is a prime.

It is a super-2 number, since 2×77161645315² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7716164527 + ... + 7716164536.

It is an arithmetic number, because the mean of its divisors is an integer number (23148493596).

Almost surely, 2^77161645315 is an apocalyptic number.

77161645315 is a deficient number, since it is larger than the sum of its proper divisors (15432329069).

77161645315 is a wasteful number, since it uses less digits than its factorization.

77161645315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15432329068.

The product of its digits is 529200, while the sum is 46.

The spelling of 77161645315 in words is "seventy-seven billion, one hundred sixty-one million, six hundred forty-five thousand, three hundred fifteen".