77854016317 has 16 divisors (see below), whose sum is σ = 99322071552. Its totient is φ = 59254639920.

The previous prime is 77854016309. The next prime is 77854016321. The reversal of 77854016317 is 71361045877.

It is not a de Polignac number, because 77854016317 - 2³ = 77854016309 is a prime.

It is a super-2 number, since 2×77854016317² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77854016417) 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, 11753563 + ... + 11760184.

It is an arithmetic number, because the mean of its divisors is an integer number (6207629472).

Almost surely, 2^77854016317 is an apocalyptic number.

77854016317 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

77854016317 is a deficient number, since it is larger than the sum of its proper divisors (21468055235).

77854016317 is a wasteful number, since it uses less digits than its factorization.

77854016317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23513808.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 77854016317 in words is "seventy-seven billion, eight hundred fifty-four million, sixteen thousand, three hundred seventeen".