318497433647 has 2 divisors, whose sum is σ = 318497433648. Its totient is φ = 318497433646.

The previous prime is 318497433643. The next prime is 318497433659. The reversal of 318497433647 is 746334794813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318497433647 - 2² = 318497433643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318497433643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159248716823 + 159248716824.

It is an arithmetic number, because the mean of its divisors is an integer number (159248716824).

Almost surely, 2^318497433647 is an apocalyptic number.

318497433647 is a deficient number, since it is larger than the sum of its proper divisors (1).

318497433647 is an equidigital number, since it uses as much as digits as its factorization.

318497433647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 59.

The spelling of 318497433647 in words is "three hundred eighteen billion, four hundred ninety-seven million, four hundred thirty-three thousand, six hundred forty-seven".