16531250540 has 72 divisors (see below), whose sum is σ = 40674347280. Its totient is φ = 5627035008.

The previous prime is 16531250531. The next prime is 16531250563. The reversal of 16531250540 is 4505213561.

It is a junction number, because it is equal to n+sod(n) for n = 16531250497 and 16531250506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75542 + ... + 196898.

It is an arithmetic number, because the mean of its divisors is an integer number (564921490).

Almost surely, 2^16531250540 is an apocalyptic number.

16531250540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16531250540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20337173640).

16531250540 is an abundant number, since it is smaller than the sum of its proper divisors (24143096740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16531250540 is a wasteful number, since it uses less digits than its factorization.

16531250540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121519 (or 121510 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 16531250540 in words is "sixteen billion, five hundred thirty-one million, two hundred fifty thousand, five hundred forty".