910642561 has 2 divisors, whose sum is σ = 910642562. Its totient is φ = 910642560.

The previous prime is 910642549. The next prime is 910642609. The reversal of 910642561 is 165246019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847916161 + 62726400 = 29119^2 + 7920^2 .

It is an emirp because it is prime and its reverse (165246019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 910642561 - 2¹⁷ = 910511489 is a prime.

It is not a weakly prime, because it can be changed into another prime (910642501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455321280 + 455321281.

It is an arithmetic number, because the mean of its divisors is an integer number (455321281).

Almost surely, 2^910642561 is an apocalyptic number.

It is an amenable number.

910642561 is a deficient number, since it is larger than the sum of its proper divisors (1).

910642561 is an equidigital number, since it uses as much as digits as its factorization.

910642561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 910642561 is about 30176.8547234466. The cubic root of 910642561 is about 969.2801407939.

The spelling of 910642561 in words is "nine hundred ten million, six hundred forty-two thousand, five hundred sixty-one".