13155500399 has 4 divisors (see below), whose sum is σ = 13156146960. Its totient is φ = 13154853840.

The previous prime is 13155500389. The next prime is 13155500419. The reversal of 13155500399 is 99300555131.

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 13155500399 - 2⁸ = 13155500143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13155500389) 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, 291734 + ... + 333795.

It is an arithmetic number, because the mean of its divisors is an integer number (3289036740).

Almost surely, 2^13155500399 is an apocalyptic number.

13155500399 is a deficient number, since it is larger than the sum of its proper divisors (646561).

13155500399 is an equidigital number, since it uses as much as digits as its factorization.

13155500399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646560.

The product of its (nonzero) digits is 91125, while the sum is 41.

The spelling of 13155500399 in words is "thirteen billion, one hundred fifty-five million, five hundred thousand, three hundred ninety-nine".