400404789063913 has 2 divisors, whose sum is σ = 400404789063914. Its totient is φ = 400404789063912.

The previous prime is 400404789063809. The next prime is 400404789063973. The reversal of 400404789063913 is 319360987404004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348931453605849 + 51473335458064 = 18679707^2 + 7174492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400404789063913 is a prime.

It is not a weakly prime, because it can be changed into another prime (400404789063973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200202394531956 + 200202394531957.

It is an arithmetic number, because the mean of its divisors is an integer number (200202394531957).

Almost surely, 2^{400404789063913} is an apocalyptic number.

It is an amenable number.

400404789063913 is a deficient number, since it is larger than the sum of its proper divisors (1).

400404789063913 is an equidigital number, since it uses as much as digits as its factorization.

400404789063913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 400404789063913 in words is "four hundred trillion, four hundred four billion, seven hundred eighty-nine million, sixty-three thousand, nine hundred thirteen".