399455544444455 has 8 divisors (see below), whose sum is σ = 479929091556192. Its totient is φ = 319176143407008.

The previous prime is 399455544444343. The next prime is 399455544444487. The reversal of 399455544444455 is 554444445554993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399455544444455 - 2⁸ = 399455544444199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48536514044 + ... + 48536522273.

It is an arithmetic number, because the mean of its divisors is an integer number (59991136444524).

Almost surely, 2^{399455544444455} is an apocalyptic number.

399455544444455 is a deficient number, since it is larger than the sum of its proper divisors (80473547111737).

399455544444455 is an equidigital number, since it uses as much as digits as its factorization.

399455544444455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97073037145.

The product of its digits is 12441600000, while the sum is 74.

The spelling of 399455544444455 in words is "three hundred ninety-nine trillion, four hundred fifty-five billion, five hundred forty-four million, four hundred forty-four thousand, four hundred fifty-five".