13506123889 has 8 divisors (see below), whose sum is σ = 13733352360. Its totient is φ = 13280572800.

The previous prime is 13506123863. The next prime is 13506123929. The reversal of 13506123889 is 98832160531.

It can be written as a sum of positive squares in 4 ways, for example, as 639078400 + 12867045489 = 25280^2 + 113433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13506123889 - 2¹⁵ = 13506091121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13506123859) 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, 403102 + ... + 435319.

It is an arithmetic number, because the mean of its divisors is an integer number (1716669045).

Almost surely, 2^13506123889 is an apocalyptic number.

It is an amenable number.

13506123889 is a deficient number, since it is larger than the sum of its proper divisors (227228471).

13506123889 is an equidigital number, since it uses as much as digits as its factorization.

13506123889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838691.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 13506123889 in words is "thirteen billion, five hundred six million, one hundred twenty-three thousand, eight hundred eighty-nine".