400155143917 has 2 divisors, whose sum is σ = 400155143918. Its totient is φ = 400155143916.

The previous prime is 400155143911. The next prime is 400155143933. The reversal of 400155143917 is 719341551004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341212529956 + 58942613961 = 584134^2 + 242781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400155143917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400155143917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400155143911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200077571958 + 200077571959.

It is an arithmetic number, because the mean of its divisors is an integer number (200077571959).

Almost surely, 2^400155143917 is an apocalyptic number.

It is an amenable number.

400155143917 is a deficient number, since it is larger than the sum of its proper divisors (1).

400155143917 is an equidigital number, since it uses as much as digits as its factorization.

400155143917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 400155143917 in words is "four hundred billion, one hundred fifty-five million, one hundred forty-three thousand, nine hundred seventeen".