315553440641393 has 2 divisors, whose sum is σ = 315553440641394. Its totient is φ = 315553440641392.

The previous prime is 315553440641371. The next prime is 315553440641449. The reversal of 315553440641393 is 393146044355513.

It is an a-pointer prime, because the next prime (315553440641449) can be obtained adding 315553440641393 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314911572079504 + 641868561889 = 17745748^2 + 801167^2 .

It is an emirp because it is prime and its reverse (393146044355513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315553440641393 - 2²² = 315553436447089 is a prime.

It is a super-2 number, since 2×315553440641393² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315553440643393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157776720320696 + 157776720320697.

It is an arithmetic number, because the mean of its divisors is an integer number (157776720320697).

Almost surely, 2^{315553440641393} is an apocalyptic number.

It is an amenable number.

315553440641393 is a deficient number, since it is larger than the sum of its proper divisors (1).

315553440641393 is an equidigital number, since it uses as much as digits as its factorization.

315553440641393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992000, while the sum is 56.

The spelling of 315553440641393 in words is "three hundred fifteen trillion, five hundred fifty-three billion, four hundred forty million, six hundred forty-one thousand, three hundred ninety-three".