400155143911 has 2 divisors, whose sum is σ = 400155143912. Its totient is φ = 400155143910.

The previous prime is 400155143903. The next prime is 400155143917. The reversal of 400155143911 is 119341551004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400155143911 - 2³ = 400155143903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400155143917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200077571955 + 200077571956.

It is an arithmetic number, because the mean of its divisors is an integer number (200077571956).

Almost surely, 2^400155143911 is an apocalyptic number.

400155143911 is a deficient number, since it is larger than the sum of its proper divisors (1).

400155143911 is an equidigital number, since it uses as much as digits as its factorization.

400155143911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

Adding to 400155143911 its reverse (119341551004), we get a palindrome (519496694915).

The spelling of 400155143911 in words is "four hundred billion, one hundred fifty-five million, one hundred forty-three thousand, nine hundred eleven".