16442253748537 has 4 divisors (see below), whose sum is σ = 16442275047460. Its totient is φ = 16442232449616.

The previous prime is 16442253748489. The next prime is 16442253748573. The reversal of 16442253748537 is 73584735224461.

16442253748537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15714160163881 + 728093584656 = 3964109^2 + 853284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16442253748537 is a prime.

It is a super-3 number, since 3×16442253748537³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442253748637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9446178 + ... + 11050555.

It is an arithmetic number, because the mean of its divisors is an integer number (4110568761865).

Almost surely, 2^{16442253748537} is an apocalyptic number.

It is an amenable number.

16442253748537 is a deficient number, since it is larger than the sum of its proper divisors (21298923).

16442253748537 is an equidigital number, since it uses as much as digits as its factorization.

16442253748537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21298922.

The product of its digits is 135475200, while the sum is 61.

The spelling of 16442253748537 in words is "sixteen trillion, four hundred forty-two billion, two hundred fifty-three million, seven hundred forty-eight thousand, five hundred thirty-seven".