400781896601833 has 2 divisors, whose sum is σ = 400781896601834. Its totient is φ = 400781896601832.

The previous prime is 400781896601813. The next prime is 400781896601951. The reversal of 400781896601833 is 338106698187004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322546226423184 + 78235670178649 = 17959572^2 + 8845093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400781896601833 is a prime.

It is a super-2 number, since 2×400781896601833² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400781896601813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200390948300916 + 200390948300917.

It is an arithmetic number, because the mean of its divisors is an integer number (200390948300917).

Almost surely, 2^{400781896601833} is an apocalyptic number.

It is an amenable number.

400781896601833 is a deficient number, since it is larger than the sum of its proper divisors (1).

400781896601833 is an equidigital number, since it uses as much as digits as its factorization.

400781896601833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The spelling of 400781896601833 in words is "four hundred trillion, seven hundred eighty-one billion, eight hundred ninety-six million, six hundred one thousand, eight hundred thirty-three".