315556245642561 has 48 divisors (see below), whose sum is σ = 532507157360640. Its totient is φ = 161478675277920.

The previous prime is 315556245642481. The next prime is 315556245642623. The reversal of 315556245642561 is 165246542655513.

It is not a de Polignac number, because 315556245642561 - 2¹⁹ = 315556245118273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315556245642495 and 315556245642504.

It is not an unprimeable number, because it can be changed into a prime (315556245640561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151117681 + ... + 153191598.

It is an arithmetic number, because the mean of its divisors is an integer number (11093899111680).

Almost surely, 2^{315556245642561} is an apocalyptic number.

It is an amenable number.

315556245642561 is a deficient number, since it is larger than the sum of its proper divisors (216950911718079).

315556245642561 is a wasteful number, since it uses less digits than its factorization.

315556245642561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304309434 (or 304309367 counting only the distinct ones).

The product of its digits is 129600000, while the sum is 60.

The spelling of 315556245642561 in words is "three hundred fifteen trillion, five hundred fifty-six billion, two hundred forty-five million, six hundred forty-two thousand, five hundred sixty-one".