16506215670 has 128 divisors (see below), whose sum is σ = 46814257152. Its totient is φ = 3644928000.

The previous prime is 16506215647. The next prime is 16506215711. The reversal of 16506215670 is 7651260561.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4561702 + ... + 4565318.

It is an arithmetic number, because the mean of its divisors is an integer number (365736384).

Almost surely, 2^16506215670 is an apocalyptic number.

16506215670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16506215670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23407128576).

16506215670 is an abundant number, since it is smaller than the sum of its proper divisors (30308041482).

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

16506215670 is a wasteful number, since it uses less digits than its factorization.

16506215670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 16506215670 in words is "sixteen billion, five hundred six million, two hundred fifteen thousand, six hundred seventy".