13120615871 has 4 divisors (see below), whose sum is σ = 14313399144. Its totient is φ = 11927832600.

The previous prime is 13120615789. The next prime is 13120615883. The reversal of 13120615871 is 17851602131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13120615871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120615891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596391620 + ... + 596391641.

It is an arithmetic number, because the mean of its divisors is an integer number (3578349786).

Almost surely, 2^13120615871 is an apocalyptic number.

13120615871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13120615871 is a deficient number, since it is larger than the sum of its proper divisors (1192783273).

13120615871 is a wasteful number, since it uses less digits than its factorization.

13120615871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192783272.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 13120615871 in words is "thirteen billion, one hundred twenty million, six hundred fifteen thousand, eight hundred seventy-one".