13169013978 has 32 divisors (see below), whose sum is σ = 26628117120. Its totient is φ = 4341470400.

The previous prime is 13169013971. The next prime is 13169014031. The reversal of 13169013978 is 87931096131.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13169013971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346203 + ... + 382353.

It is an arithmetic number, because the mean of its divisors is an integer number (832128660).

Almost surely, 2^13169013978 is an apocalyptic number.

13169013978 is an abundant number, since it is smaller than the sum of its proper divisors (13459103142).

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

13169013978 is a wasteful number, since it uses less digits than its factorization.

13169013978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36822.

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 13169013978 in words is "thirteen billion, one hundred sixty-nine million, thirteen thousand, nine hundred seventy-eight".