77809496317 has 16 divisors (see below), whose sum is σ = 93071849472. Its totient is φ = 63601346160.

The previous prime is 77809496161. The next prime is 77809496341. The reversal of 77809496317 is 71369490877.

It is a de Polignac number, because none of the positive numbers 2^k-77809496317 is a prime.

It is a super-3 number, since 3×77809496317³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77809496617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676753 + ... + 783334.

It is an arithmetic number, because the mean of its divisors is an integer number (5816990592).

Almost surely, 2^77809496317 is an apocalyptic number.

It is an amenable number.

77809496317 is a deficient number, since it is larger than the sum of its proper divisors (15262353155).

77809496317 is a wasteful number, since it uses less digits than its factorization.

77809496317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460448.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 77809496317 in words is "seventy-seven billion, eight hundred nine million, four hundred ninety-six thousand, three hundred seventeen".