40604312125561 has 2 divisors, whose sum is σ = 40604312125562. Its totient is φ = 40604312125560.

The previous prime is 40604312125511. The next prime is 40604312125661. The reversal of 40604312125561 is 16552121340604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20546955765625 + 20057356359936 = 4532875^2 + 4478544^2 .

It is a cyclic number.

It is not a de Polignac number, because 40604312125561 - 2⁹ = 40604312125049 is a prime.

It is not a weakly prime, because it can be changed into another prime (40604312125511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20302156062780 + 20302156062781.

It is an arithmetic number, because the mean of its divisors is an integer number (20302156062781).

Almost surely, 2^{40604312125561} is an apocalyptic number.

It is an amenable number.

40604312125561 is a deficient number, since it is larger than the sum of its proper divisors (1).

40604312125561 is an equidigital number, since it uses as much as digits as its factorization.

40604312125561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 40604312125561 in words is "forty trillion, six hundred four billion, three hundred twelve million, one hundred twenty-five thousand, five hundred sixty-one".