338553956399 has 4 divisors (see below), whose sum is σ = 344104021320. Its totient is φ = 333003891480.

The previous prime is 338553956347. The next prime is 338553956417. The reversal of 338553956399 is 993659355833.

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 338553956399 - 2²⁸ = 338285520943 is a prime.

It is a super-2 number, since 2×338553956399² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338553956309) 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, 2775032369 + ... + 2775032490.

It is an arithmetic number, because the mean of its divisors is an integer number (86026005330).

Almost surely, 2^338553956399 is an apocalyptic number.

338553956399 is a deficient number, since it is larger than the sum of its proper divisors (5550064921).

338553956399 is an equidigital number, since it uses as much as digits as its factorization.

338553956399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550064920.

The product of its digits is 354294000, while the sum is 68.

The spelling of 338553956399 in words is "three hundred thirty-eight billion, five hundred fifty-three million, nine hundred fifty-six thousand, three hundred ninety-nine".