16506145237 has 2 divisors, whose sum is σ = 16506145238. Its totient is φ = 16506145236.

The previous prime is 16506145157. The next prime is 16506145277. The reversal of 16506145237 is 73254160561.

It is an a-pointer prime, because the next prime (16506145277) can be obtained adding 16506145237 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12794776996 + 3711368241 = 113114^2 + 60921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16506145237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16506145237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506145277) 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 as a sum of consecutive naturals, namely, 8253072618 + 8253072619.

It is an arithmetic number, because the mean of its divisors is an integer number (8253072619).

Almost surely, 2^16506145237 is an apocalyptic number.

It is an amenable number.

16506145237 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506145237 is an equidigital number, since it uses as much as digits as its factorization.

16506145237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 16506145237 in words is "sixteen billion, five hundred six million, one hundred forty-five thousand, two hundred thirty-seven".