13043478261 has 24 divisors (see below), whose sum is σ = 19122910240. Its totient is φ = 7902306720.

The previous prime is 13043478251. The next prime is 13043478289. The reversal of 13043478261 is 16287434031.

It is not a de Polignac number, because 13043478261 - 2¹¹ = 13043476213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13043478241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1481370 + ... + 1490148.

Almost surely, 2^13043478261 is an apocalyptic number.

13043478261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13043478261 is a deficient number, since it is larger than the sum of its proper divisors (6079431979).

13043478261 is a wasteful number, since it uses less digits than its factorization.

13043478261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12897 (or 12886 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 13043478261 in words is "thirteen billion, forty-three million, four hundred seventy-eight thousand, two hundred sixty-one".