1612543623 has 16 divisors (see below), whose sum is σ = 2270083200. Its totient is φ = 1015359840.

The previous prime is 1612543613. The next prime is 1612543627. The reversal of 1612543623 is 3263452161.

It is not a de Polignac number, because 1612543623 - 2⁹ = 1612543111 is a prime.

It is a super-2 number, since 2×1612543623² = 5200593872155932258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612543627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23868 + ... + 61601.

It is an arithmetic number, because the mean of its divisors is an integer number (141880200).

Almost surely, 2^1612543623 is an apocalyptic number.

1612543623 is a deficient number, since it is larger than the sum of its proper divisors (657539577).

1612543623 is a wasteful number, since it uses less digits than its factorization.

1612543623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85822.

The product of its digits is 25920, while the sum is 33.

The square root of 1612543623 is about 40156.4891767196. The cubic root of 1612543623 is about 1172.6556238743.

Adding to 1612543623 its reverse (3263452161), we get a palindrome (4875995784).

The spelling of 1612543623 in words is "one billion, six hundred twelve million, five hundred forty-three thousand, six hundred twenty-three".