15681884613 has 16 divisors (see below), whose sum is σ = 21399476736. Its totient is φ = 10209533040.

The previous prime is 15681884611. The next prime is 15681884641. The reversal of 15681884613 is 31648818651.

It is not a de Polignac number, because 15681884613 - 2¹ = 15681884611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15681884611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064806 + ... + 1079432.

It is an arithmetic number, because the mean of its divisors is an integer number (1337467296).

Almost surely, 2^15681884613 is an apocalyptic number.

It is an amenable number.

15681884613 is a deficient number, since it is larger than the sum of its proper divisors (5717592123).

15681884613 is a wasteful number, since it uses less digits than its factorization.

15681884613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22984.

The product of its digits is 1105920, while the sum is 51.

The spelling of 15681884613 in words is "fifteen billion, six hundred eighty-one million, eight hundred eighty-four thousand, six hundred thirteen".