13533210978 has 64 divisors (see below), whose sum is σ = 34476503040. Its totient is φ = 3447643392.

The previous prime is 13533210953. The next prime is 13533210979. The reversal of 13533210978 is 87901233531.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (13533210979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485226 + ... + 512357.

It is an arithmetic number, because the mean of its divisors is an integer number (538695360).

Almost surely, 2^13533210978 is an apocalyptic number.

13533210978 is an abundant number, since it is smaller than the sum of its proper divisors (20943292062).

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

13533210978 is a wasteful number, since it uses less digits than its factorization.

13533210978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997631.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 13533210978 in words is "thirteen billion, five hundred thirty-three million, two hundred ten thousand, nine hundred seventy-eight".