400321421163 has 24 divisors (see below), whose sum is σ = 604592352000. Its totient is φ = 254765784240.

The previous prime is 400321421107. The next prime is 400321421183. The reversal of 400321421163 is 361124123004.

It is a happy number.

400321421163 is a `hidden beast` number, since 400 + 3 + 2 + 142 + 116 + 3 = 666.

It is not a de Polignac number, because 400321421163 - 2¹⁴ = 400321404779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400321421183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1834503 + ... + 2041088.

It is an arithmetic number, because the mean of its divisors is an integer number (25191348000).

Almost surely, 2^400321421163 is an apocalyptic number.

400321421163 is a deficient number, since it is larger than the sum of its proper divisors (204270930837).

400321421163 is a wasteful number, since it uses less digits than its factorization.

400321421163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876119 (or 3876116 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 400321421163 its reverse (361124123004), we get a palindrome (761445544167).

It can be divided in two parts, 40032 and 1421163, that added together give a triangular number (1461195 = T₁₇₀₉).

The spelling of 400321421163 in words is "four hundred billion, three hundred twenty-one million, four hundred twenty-one thousand, one hundred sixty-three".