399791452355 has 4 divisors (see below), whose sum is σ = 479749742832. Its totient is φ = 319833161880.

The previous prime is 399791452351. The next prime is 399791452373. The reversal of 399791452355 is 553254197993.

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

It is not a de Polignac number, because 399791452355 - 2² = 399791452351 is a prime.

It is a super-2 number, since 2×399791452355² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399791452351) 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, 39979145231 + ... + 39979145240.

It is an arithmetic number, because the mean of its divisors is an integer number (119937435708).

Almost surely, 2^399791452355 is an apocalyptic number.

399791452355 is a deficient number, since it is larger than the sum of its proper divisors (79958290477).

399791452355 is an equidigital number, since it uses as much as digits as its factorization.

399791452355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79958290476.

The product of its digits is 45927000, while the sum is 62.

The spelling of 399791452355 in words is "three hundred ninety-nine billion, seven hundred ninety-one million, four hundred fifty-two thousand, three hundred fifty-five".