13404404155 has 4 divisors (see below), whose sum is σ = 16085284992. Its totient is φ = 10723523320.

The previous prime is 13404404149. The next prime is 13404404161. The reversal of 13404404155 is 55140440431.

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

It is an interprime number because it is at equal distance from previous prime (13404404149) and next prime (13404404161).

It is a de Polignac number, because none of the positive numbers 2^k-13404404155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340440411 + ... + 1340440420.

It is an arithmetic number, because the mean of its divisors is an integer number (4021321248).

Almost surely, 2^13404404155 is an apocalyptic number.

13404404155 is a deficient number, since it is larger than the sum of its proper divisors (2680880837).

13404404155 is an equidigital number, since it uses as much as digits as its factorization.

13404404155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680880836.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 13404404155 its reverse (55140440431), we get a palindrome (68544844586).

The spelling of 13404404155 in words is "thirteen billion, four hundred four million, four hundred four thousand, one hundred fifty-five".