915566401 has 2 divisors, whose sum is σ = 915566402. Its totient is φ = 915566400.

The previous prime is 915566389. The next prime is 915566423. The reversal of 915566401 is 104665519.

915566401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745290000 + 170276401 = 27300^2 + 13049^2 .

It is a cyclic number.

It is not a de Polignac number, because 915566401 - 2¹⁹ = 915042113 is a prime.

It is not a weakly prime, because it can be changed into another prime (915566461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457783200 + 457783201.

It is an arithmetic number, because the mean of its divisors is an integer number (457783201).

Almost surely, 2^915566401 is an apocalyptic number.

It is an amenable number.

915566401 is a deficient number, since it is larger than the sum of its proper divisors (1).

915566401 is an equidigital number, since it uses as much as digits as its factorization.

915566401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 915566401 is about 30258.3277958317. The cubic root of 915566401 is about 971.0239659804.

The spelling of 915566401 in words is "nine hundred fifteen million, five hundred sixty-six thousand, four hundred one".