400081430899 has 4 divisors (see below), whose sum is σ = 400506598080. Its totient is φ = 399656263720.

The previous prime is 400081430873. The next prime is 400081430971. The reversal of 400081430899 is 998034180004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400081430899 - 2⁵ = 400081430867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400081430869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212582179 + ... + 212584060.

It is an arithmetic number, because the mean of its divisors is an integer number (100126649520).

Almost surely, 2^400081430899 is an apocalyptic number.

400081430899 is a deficient number, since it is larger than the sum of its proper divisors (425167181).

400081430899 is an equidigital number, since it uses as much as digits as its factorization.

400081430899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425167180.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 400081430899 in words is "four hundred billion, eighty-one million, four hundred thirty thousand, eight hundred ninety-nine".