16506134465 has 8 divisors (see below), whose sum is σ = 20029916520. Its totient is φ = 13056537472.

The previous prime is 16506134431. The next prime is 16506134467. The reversal of 16506134465 is 56443160561.

It can be written as a sum of positive squares in 4 ways, for example, as 171505216 + 16334629249 = 13096^2 + 127807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16506134465 - 2¹² = 16506130369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16506134467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18545774 + ... + 18546663.

It is an arithmetic number, because the mean of its divisors is an integer number (2503739565).

Almost surely, 2^16506134465 is an apocalyptic number.

It is an amenable number.

16506134465 is a deficient number, since it is larger than the sum of its proper divisors (3523782055).

16506134465 is an equidigital number, since it uses as much as digits as its factorization.

16506134465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37092531.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 16506134465 in words is "sixteen billion, five hundred six million, one hundred thirty-four thousand, four hundred sixty-five".