13538143478 has 16 divisors (see below), whose sum is σ = 20783968656. Its totient is φ = 6610222080.

The previous prime is 13538143471. The next prime is 13538143523. The reversal of 13538143478 is 87434183531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13538143471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460550 + ... + 489062.

It is an arithmetic number, because the mean of its divisors is an integer number (1298998041).

Almost surely, 2^13538143478 is an apocalyptic number.

13538143478 is a deficient number, since it is larger than the sum of its proper divisors (7245825178).

13538143478 is a wasteful number, since it uses less digits than its factorization.

13538143478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34079.

The product of its digits is 967680, while the sum is 47.

The spelling of 13538143478 in words is "thirteen billion, five hundred thirty-eight million, one hundred forty-three thousand, four hundred seventy-eight".