316261578681 has 16 divisors (see below), whose sum is σ = 479963373120. Its totient is φ = 205698587040.

The previous prime is 316261578671. The next prime is 316261578697. The reversal of 316261578681 is 186875162613.

It is a happy number.

316261578681 is a `hidden beast` number, since 3 + 1 + 6 + 2 + 6 + 1 + 578 + 68 + 1 = 666.

It is not a de Polignac number, because 316261578681 - 2¹⁷ = 316261447609 is a prime.

It is a super-2 number, since 2×316261578681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (316261578631) 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, 142845135 + ... + 142847348.

It is an arithmetic number, because the mean of its divisors is an integer number (29997710820).

Almost surely, 2^316261578681 is an apocalyptic number.

It is an amenable number.

316261578681 is a deficient number, since it is larger than the sum of its proper divisors (163701794439).

316261578681 is a wasteful number, since it uses less digits than its factorization.

316261578681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285692533 (or 285692527 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 316261578681 in words is "three hundred sixteen billion, two hundred sixty-one million, five hundred seventy-eight thousand, six hundred eighty-one".