400445633321 has 16 divisors (see below), whose sum is σ = 413777362944. Its totient is φ = 387308419344.

The previous prime is 400445633303. The next prime is 400445633323. The reversal of 400445633321 is 123336544004.

It is a cyclic number.

It is not a de Polignac number, because 400445633321 - 2²² = 400441439017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400445633323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2786000 + ... + 2926206.

It is an arithmetic number, because the mean of its divisors is an integer number (25861085184).

Almost surely, 2^400445633321 is an apocalyptic number.

It is an amenable number.

400445633321 is a deficient number, since it is larger than the sum of its proper divisors (13331729623).

400445633321 is a wasteful number, since it uses less digits than its factorization.

400445633321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140900.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 400445633321 in words is "four hundred billion, four hundred forty-five million, six hundred thirty-three thousand, three hundred twenty-one".