16506062521 has 12 divisors (see below), whose sum is σ = 18057708732. Its totient is φ = 15079274496.

The previous prime is 16506062477. The next prime is 16506062533. The reversal of 16506062521 is 12526060561.

It can be written as a sum of positive squares in 6 ways, for example, as 4171738921 + 12334323600 = 64589^2 + 111060^2 .

It is not a de Polignac number, because 16506062521 - 2⁹ = 16506062009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506069521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 487056 + ... + 519841.

It is an arithmetic number, because the mean of its divisors is an integer number (1504809061).

Almost surely, 2^16506062521 is an apocalyptic number.

It is an amenable number.

16506062521 is a deficient number, since it is larger than the sum of its proper divisors (1551646211).

16506062521 is a wasteful number, since it uses less digits than its factorization.

16506062521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007020 (or 1007007 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 16506062521 in words is "sixteen billion, five hundred six million, sixty-two thousand, five hundred twenty-one".