16572226553 has 4 divisors (see below), whose sum is σ = 16683449700. Its totient is φ = 16461003408.

The previous prime is 16572226537. The next prime is 16572226579. The reversal of 16572226553 is 35562227561.

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 7697079289 + 8875147264 = 87733^2 + 94208^2 .

It is a cyclic number.

It is not a de Polignac number, because 16572226553 - 2⁴ = 16572226537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16572226513) 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, 55611350 + ... + 55611647.

It is an arithmetic number, because the mean of its divisors is an integer number (4170862425).

Almost surely, 2^16572226553 is an apocalyptic number.

It is an amenable number.

16572226553 is a deficient number, since it is larger than the sum of its proper divisors (111223147).

16572226553 is a wasteful number, since it uses less digits than its factorization.

16572226553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111223146.

The product of its digits is 756000, while the sum is 44.

The spelling of 16572226553 in words is "sixteen billion, five hundred seventy-two million, two hundred twenty-six thousand, five hundred fifty-three".