40423211565889 has 2 divisors, whose sum is σ = 40423211565890. Its totient is φ = 40423211565888.

The previous prime is 40423211565829. The next prime is 40423211565899. The reversal of 40423211565889 is 98856511232404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27278475494400 + 13144736071489 = 5222880^2 + 3625567^2 .

It is a cyclic number.

It is not a de Polignac number, because 40423211565889 - 2¹³ = 40423211557697 is a prime.

It is not a weakly prime, because it can be changed into another prime (40423211565829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20211605782944 + 20211605782945.

It is an arithmetic number, because the mean of its divisors is an integer number (20211605782945).

Almost surely, 2^{40423211565889} is an apocalyptic number.

It is an amenable number.

40423211565889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40423211565889 is an equidigital number, since it uses as much as digits as its factorization.

40423211565889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16588800, while the sum is 58.

The spelling of 40423211565889 in words is "forty trillion, four hundred twenty-three billion, two hundred eleven million, five hundred sixty-five thousand, eight hundred eighty-nine".