400731734706617 has 2 divisors, whose sum is σ = 400731734706618. Its totient is φ = 400731734706616.

The previous prime is 400731734706593. The next prime is 400731734706749. The reversal of 400731734706617 is 716607437137004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311136120180601 + 89595614526016 = 17639051^2 + 9465496^2 .

It is a cyclic number.

It is not a de Polignac number, because 400731734706617 - 2⁶ = 400731734706553 is a prime.

It is not a weakly prime, because it can be changed into another prime (400731734702617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200365867353308 + 200365867353309.

It is an arithmetic number, because the mean of its divisors is an integer number (200365867353309).

Almost surely, 2^{400731734706617} is an apocalyptic number.

It is an amenable number.

400731734706617 is a deficient number, since it is larger than the sum of its proper divisors (1).

400731734706617 is an equidigital number, since it uses as much as digits as its factorization.

400731734706617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12446784, while the sum is 56.

The spelling of 400731734706617 in words is "four hundred trillion, seven hundred thirty-one billion, seven hundred thirty-four million, seven hundred six thousand, six hundred seventeen".