13404878755 has 4 divisors (see below), whose sum is σ = 16085854512. Its totient is φ = 10723903000.

The previous prime is 13404878693. The next prime is 13404878759. The reversal of 13404878755 is 55787840431.

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

It is not a de Polignac number, because 13404878755 - 2²¹ = 13402781603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13404878759) 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, 1340487871 + ... + 1340487880.

It is an arithmetic number, because the mean of its divisors is an integer number (4021463628).

Almost surely, 2^13404878755 is an apocalyptic number.

13404878755 is a deficient number, since it is larger than the sum of its proper divisors (2680975757).

13404878755 is an equidigital number, since it uses as much as digits as its factorization.

13404878755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680975756.

The product of its (nonzero) digits is 3763200, while the sum is 52.

The spelling of 13404878755 in words is "thirteen billion, four hundred four million, eight hundred seventy-eight thousand, seven hundred fifty-five".