16506423537 has 8 divisors (see below), whose sum is σ = 22255852320. Its totient is φ = 10880638560.

The previous prime is 16506423529. The next prime is 16506423539. The reversal of 16506423537 is 73532460561.

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

It is not a de Polignac number, because 16506423537 - 2³ = 16506423529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16506423539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30910639 + ... + 30911172.

It is an arithmetic number, because the mean of its divisors is an integer number (2781981540).

Almost surely, 2^16506423537 is an apocalyptic number.

It is an amenable number.

16506423537 is a deficient number, since it is larger than the sum of its proper divisors (5749428783).

16506423537 is an equidigital number, since it uses as much as digits as its factorization.

16506423537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61821903.

The product of its (nonzero) digits is 453600, while the sum is 42.

The spelling of 16506423537 in words is "sixteen billion, five hundred six million, four hundred twenty-three thousand, five hundred thirty-seven".