16531253885 has 16 divisors (see below), whose sum is σ = 19922284800. Its totient is φ = 13168552320.

The previous prime is 16531253863. The next prime is 16531253957. The reversal of 16531253885 is 58835213561.

It is a happy number.

It is not a de Polignac number, because 16531253885 - 2¹⁰ = 16531252861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2501816 + ... + 2508414.

It is an arithmetic number, because the mean of its divisors is an integer number (1245142800).

Almost surely, 2^16531253885 is an apocalyptic number.

It is an amenable number.

16531253885 is a deficient number, since it is larger than the sum of its proper divisors (3391030915).

16531253885 is a wasteful number, since it uses less digits than its factorization.

16531253885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8668.

The product of its digits is 864000, while the sum is 47.

The spelling of 16531253885 in words is "sixteen billion, five hundred thirty-one million, two hundred fifty-three thousand, eight hundred eighty-five".