315550661040401 has 2 divisors, whose sum is σ = 315550661040402. Its totient is φ = 315550661040400.

The previous prime is 315550661040343. The next prime is 315550661040431. The reversal of 315550661040401 is 104040166055513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298480873006801 + 17069788033600 = 17276599^2 + 4131560^2 .

It is an emirp because it is prime and its reverse (104040166055513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315550661040401 - 2²² = 315550656846097 is a prime.

It is not a weakly prime, because it can be changed into another prime (315550661040431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157775330520200 + 157775330520201.

It is an arithmetic number, because the mean of its divisors is an integer number (157775330520201).

Almost surely, 2^{315550661040401} is an apocalyptic number.

It is an amenable number.

315550661040401 is a deficient number, since it is larger than the sum of its proper divisors (1).

315550661040401 is an equidigital number, since it uses as much as digits as its factorization.

315550661040401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 315550661040401 in words is "three hundred fifteen trillion, five hundred fifty billion, six hundred sixty-one million, forty thousand, four hundred one".