400653922489 has 2 divisors, whose sum is σ = 400653922490. Its totient is φ = 400653922488.

The previous prime is 400653922453. The next prime is 400653922499. The reversal of 400653922489 is 984229356004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248319832489 + 152334090000 = 498317^2 + 390300^2 .

It is a cyclic number.

It is not a de Polignac number, because 400653922489 - 2²⁹ = 400117051577 is a prime.

It is not a weakly prime, because it can be changed into another prime (400653922439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200326961244 + 200326961245.

It is an arithmetic number, because the mean of its divisors is an integer number (200326961245).

Almost surely, 2^400653922489 is an apocalyptic number.

It is an amenable number.

400653922489 is a deficient number, since it is larger than the sum of its proper divisors (1).

400653922489 is an equidigital number, since it uses as much as digits as its factorization.

400653922489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 400653922489 in words is "four hundred billion, six hundred fifty-three million, nine hundred twenty-two thousand, four hundred eighty-nine".