40641451457 has 2 divisors, whose sum is σ = 40641451458. Its totient is φ = 40641451456.

The previous prime is 40641451447. The next prime is 40641451463. The reversal of 40641451457 is 75415414604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39744808321 + 896643136 = 199361^2 + 29944^2 .

It is a cyclic number.

It is not a de Polignac number, because 40641451457 - 2²⁴ = 40624674241 is a prime.

It is not a weakly prime, because it can be changed into another prime (40641451447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20320725728 + 20320725729.

It is an arithmetic number, because the mean of its divisors is an integer number (20320725729).

Almost surely, 2^40641451457 is an apocalyptic number.

It is an amenable number.

40641451457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40641451457 is an equidigital number, since it uses as much as digits as its factorization.

40641451457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 40641451457 in words is "forty billion, six hundred forty-one million, four hundred fifty-one thousand, four hundred fifty-seven".