400435204149881 has 2 divisors, whose sum is σ = 400435204149882. Its totient is φ = 400435204149880.

The previous prime is 400435204149863. The next prime is 400435204149917. The reversal of 400435204149881 is 188941402534004.

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., 300179360719225 + 100255843430656 = 17325685^2 + 10012784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400435204149881 is a prime.

It is a super-2 number, since 2×400435204149881² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400435204143881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200217602074940 + 200217602074941.

It is an arithmetic number, because the mean of its divisors is an integer number (200217602074941).

Almost surely, 2^{400435204149881} is an apocalyptic number.

It is an amenable number.

400435204149881 is a deficient number, since it is larger than the sum of its proper divisors (1).

400435204149881 is an equidigital number, since it uses as much as digits as its factorization.

400435204149881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 400435204149881 in words is "four hundred trillion, four hundred thirty-five billion, two hundred four million, one hundred forty-nine thousand, eight hundred eighty-one".