316261578643 has 2 divisors, whose sum is σ = 316261578644. Its totient is φ = 316261578642.

The previous prime is 316261578631. The next prime is 316261578671. The reversal of 316261578643 is 346875162613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 316261578643 - 2²¹ = 316259481491 is a prime.

It is a super-2 number, since 2×316261578643² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (316261528643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158130789321 + 158130789322.

It is an arithmetic number, because the mean of its divisors is an integer number (158130789322).

Almost surely, 2^316261578643 is an apocalyptic number.

316261578643 is a deficient number, since it is larger than the sum of its proper divisors (1).

316261578643 is an equidigital number, since it uses as much as digits as its factorization.

316261578643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 52.

The spelling of 316261578643 in words is "three hundred sixteen billion, two hundred sixty-one million, five hundred seventy-eight thousand, six hundred forty-three".