400664512633613 has 2 divisors, whose sum is σ = 400664512633614. Its totient is φ = 400664512633612.

The previous prime is 400664512633597. The next prime is 400664512633633. The reversal of 400664512633613 is 316336215466004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299042246094244 + 101622266539369 = 17292838^2 + 10080787^2 .

It is a cyclic number.

It is not a de Polignac number, because 400664512633613 - 2⁴ = 400664512633597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400664512633633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200332256316806 + 200332256316807.

It is an arithmetic number, because the mean of its divisors is an integer number (200332256316807).

Almost surely, 2^{400664512633613} is an apocalyptic number.

It is an amenable number.

400664512633613 is a deficient number, since it is larger than the sum of its proper divisors (1).

400664512633613 is an equidigital number, since it uses as much as digits as its factorization.

400664512633613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 400664512633613 in words is "four hundred trillion, six hundred sixty-four billion, five hundred twelve million, six hundred thirty-three thousand, six hundred thirteen".