316561761 has 12 divisors (see below), whose sum is σ = 457534740. Its totient is φ = 210912480.

The previous prime is 316561753. The next prime is 316561781. The reversal of 316561761 is 167165613.

316561761 is a `hidden beast` number, since 31 + 6 + 5 + 617 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 248251536 + 68310225 = 15756^2 + 8265^2 .

It is not a de Polignac number, because 316561761 - 2³ = 316561753 is a prime.

It is a super-2 number, since 2×316561761² = 200422697054842242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (316561711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6271 + ... + 25931.

It is an arithmetic number, because the mean of its divisors is an integer number (38127895).

Almost surely, 2^316561761 is an apocalyptic number.

It is an amenable number.

316561761 is a deficient number, since it is larger than the sum of its proper divisors (140972979).

316561761 is a wasteful number, since it uses less digits than its factorization.

316561761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21456 (or 21453 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 316561761 is about 17792.1825811225. The cubic root of 316561761 is about 681.5318414558.

The spelling of 316561761 in words is "three hundred sixteen million, five hundred sixty-one thousand, seven hundred sixty-one".