315504443987 has 2 divisors, whose sum is σ = 315504443988. Its totient is φ = 315504443986.

The previous prime is 315504443977. The next prime is 315504444037. The reversal of 315504443987 is 789344405513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315504443987 - 2²² = 315500249683 is a prime.

It is not a weakly prime, because it can be changed into another prime (315504443957) 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, 157752221993 + 157752221994.

It is an arithmetic number, because the mean of its divisors is an integer number (157752221994).

Almost surely, 2^315504443987 is an apocalyptic number.

315504443987 is a deficient number, since it is larger than the sum of its proper divisors (1).

315504443987 is an equidigital number, since it uses as much as digits as its factorization.

315504443987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 315504443987 in words is "three hundred fifteen billion, five hundred four million, four hundred forty-three thousand, nine hundred eighty-seven".