16506145243 has 6 divisors (see below), whose sum is σ = 19201026156. Its totient is φ = 14148124452.

The previous prime is 16506145237. The next prime is 16506145277. The reversal of 16506145243 is 34254160561.

It is not a de Polignac number, because 16506145243 - 2⁹ = 16506144731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506145283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168430005 + ... + 168430102.

It is an arithmetic number, because the mean of its divisors is an integer number (3200171026).

Almost surely, 2^16506145243 is an apocalyptic number.

16506145243 is a deficient number, since it is larger than the sum of its proper divisors (2694880913).

16506145243 is an equidigital number, since it uses as much as digits as its factorization.

16506145243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336860121 (or 336860114 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 16506145243 in words is "sixteen billion, five hundred six million, one hundred forty-five thousand, two hundred forty-three".