16531506752 has 28 divisors (see below), whose sum is σ = 32847465420. Its totient is φ = 8254980096.

The previous prime is 16531506743. The next prime is 16531506779. The reversal of 16531506752 is 25760513561.

It can be written as a sum of positive squares in 2 ways, for example, as 3053225536 + 13478281216 = 55256^2 + 116096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118733 + ... + 217164.

It is an arithmetic number, because the mean of its divisors is an integer number (1173123765).

Almost surely, 2^16531506752 is an apocalyptic number.

It is an amenable number.

16531506752 is a deficient number, since it is larger than the sum of its proper divisors (16315958668).

16531506752 is an equidigital number, since it uses as much as digits as its factorization.

16531506752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336678 (or 336668 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 16531506752 in words is "sixteen billion, five hundred thirty-one million, five hundred six thousand, seven hundred fifty-two".