400040399953 has 2 divisors, whose sum is σ = 400040399954. Its totient is φ = 400040399952.

The previous prime is 400040399909. The next prime is 400040399959. The reversal of 400040399953 is 359993040004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326158636609 + 73881763344 = 571103^2 + 271812^2 .

It is a cyclic number.

It is not a de Polignac number, because 400040399953 - 2⁹ = 400040399441 is a prime.

It is not a weakly prime, because it can be changed into another prime (400040399959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200020199976 + 200020199977.

It is an arithmetic number, because the mean of its divisors is an integer number (200020199977).

Almost surely, 2^400040399953 is an apocalyptic number.

It is an amenable number.

400040399953 is a deficient number, since it is larger than the sum of its proper divisors (1).

400040399953 is an equidigital number, since it uses as much as digits as its factorization.

400040399953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 46.

The spelling of 400040399953 in words is "four hundred billion, forty million, three hundred ninety-nine thousand, nine hundred fifty-three".