16572226537 has 2 divisors, whose sum is σ = 16572226538. Its totient is φ = 16572226536.

The previous prime is 16572226513. The next prime is 16572226579. The reversal of 16572226537 is 73562227561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16542075456 + 30151081 = 128616^2 + 5491^2 .

It is an emirp because it is prime and its reverse (73562227561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16572226537 - 2²⁷ = 16438008809 is a prime.

It is not a weakly prime, because it can be changed into another prime (16572226597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8286113268 + 8286113269.

It is an arithmetic number, because the mean of its divisors is an integer number (8286113269).

Almost surely, 2^16572226537 is an apocalyptic number.

It is an amenable number.

16572226537 is a deficient number, since it is larger than the sum of its proper divisors (1).

16572226537 is an equidigital number, since it uses as much as digits as its factorization.

16572226537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 46.

The spelling of 16572226537 in words is "sixteen billion, five hundred seventy-two million, two hundred twenty-six thousand, five hundred thirty-seven".