15645222543 has 16 divisors (see below), whose sum is σ = 21008531936. Its totient is φ = 10356128640.

The previous prime is 15645222533. The next prime is 15645222547. The reversal of 15645222543 is 34522254651.

15645222543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15645222543 - 2¹⁸ = 15644960399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15645222547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672933 + ... + 695793.

It is an arithmetic number, because the mean of its divisors is an integer number (1313033246).

Almost surely, 2^15645222543 is an apocalyptic number.

15645222543 is a deficient number, since it is larger than the sum of its proper divisors (5363309393).

15645222543 is a wasteful number, since it uses less digits than its factorization.

15645222543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24474.

The product of its digits is 288000, while the sum is 39.

The spelling of 15645222543 in words is "fifteen billion, six hundred forty-five million, two hundred twenty-two thousand, five hundred forty-three".