401985320833 has 2 divisors, whose sum is σ = 401985320834. Its totient is φ = 401985320832.

The previous prime is 401985320827. The next prime is 401985320887. The reversal of 401985320833 is 338023589104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400039805169 + 1945515664 = 632487^2 + 44108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401985320833 is a prime.

It is not a weakly prime, because it can be changed into another prime (401985329833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200992660416 + 200992660417.

It is an arithmetic number, because the mean of its divisors is an integer number (200992660417).

Almost surely, 2^401985320833 is an apocalyptic number.

It is an amenable number.

401985320833 is a deficient number, since it is larger than the sum of its proper divisors (1).

401985320833 is an equidigital number, since it uses as much as digits as its factorization.

401985320833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 401985320833 in words is "four hundred one billion, nine hundred eighty-five million, three hundred twenty thousand, eight hundred thirty-three".