40561601 has 2 divisors, whose sum is σ = 40561602. Its totient is φ = 40561600.

The previous prime is 40561571. The next prime is 40561607. The reversal of 40561601 is 10616504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 12418576 = 5305^2 + 3524^2 .

It is a cyclic number.

It is not a de Polignac number, because 40561601 - 2⁶ = 40561537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40561607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20280800 + 20280801.

It is an arithmetic number, because the mean of its divisors is an integer number (20280801).

Almost surely, 2^40561601 is an apocalyptic number.

It is an amenable number.

40561601 is a deficient number, since it is larger than the sum of its proper divisors (1).

40561601 is an equidigital number, since it uses as much as digits as its factorization.

40561601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40561601 is about 6368.7990233638. The cubic root of 40561601 is about 343.5882970143.

The spelling of 40561601 in words is "forty million, five hundred sixty-one thousand, six hundred one".