13205545878 has 16 divisors (see below), whose sum is σ = 30184104960. Its totient is φ = 3773013096.

The previous prime is 13205545861. The next prime is 13205545901. The reversal of 13205545878 is 87854550231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157208838 + ... + 157208921.

It is an arithmetic number, because the mean of its divisors is an integer number (1886506560).

Almost surely, 2^13205545878 is an apocalyptic number.

13205545878 is an abundant number, since it is smaller than the sum of its proper divisors (16978559082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13205545878 is a wasteful number, since it uses less digits than its factorization.

13205545878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314417771.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 13205545878 in words is "thirteen billion, two hundred five million, five hundred forty-five thousand, eight hundred seventy-eight".