399409920001 has 16 divisors (see below), whose sum is σ = 406268448768. Its totient is φ = 392587549200.

The previous prime is 399409919989. The next prime is 399409920029. The reversal of 399409920001 is 100029904993.

It is a cyclic number.

It is not a de Polignac number, because 399409920001 - 2¹³ = 399409911809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399409980001) 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, 32564196 + ... + 32576458.

It is an arithmetic number, because the mean of its divisors is an integer number (25391778048).

Almost surely, 2^399409920001 is an apocalyptic number.

It is an amenable number.

399409920001 is a deficient number, since it is larger than the sum of its proper divisors (6858528767).

399409920001 is a wasteful number, since it uses less digits than its factorization.

399409920001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13692.

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 399409920001 in words is "three hundred ninety-nine billion, four hundred nine million, nine hundred twenty thousand, one".