400100409999 has 24 divisors (see below), whose sum is σ = 582244494000. Its totient is φ = 264741713280.

The previous prime is 400100409997. The next prime is 400100410091. The reversal of 400100409999 is 999904001004.

It is not a de Polignac number, because 400100409999 - 2¹ = 400100409997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400100409997) 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 in 23 ways as a sum of consecutive naturals, for example, 1658532 + ... + 1884390.

It is an arithmetic number, because the mean of its divisors is an integer number (24260187250).

Almost surely, 2^400100409999 is an apocalyptic number.

400100409999 is a deficient number, since it is larger than the sum of its proper divisors (182144084001).

400100409999 is a wasteful number, since it uses less digits than its factorization.

400100409999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227335 (or 227332 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 400100409999 in words is "four hundred billion, one hundred million, four hundred nine thousand, nine hundred ninety-nine".