1543322645 has 32 divisors (see below), whose sum is σ = 1989411840. Its totient is φ = 1145272320.

The previous prime is 1543322621. The next prime is 1543322647. The reversal of 1543322645 is 5462233451.

1543322645 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1543322645 - 2²⁴ = 1526545429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543322647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3580580 + ... + 3581010.

It is an arithmetic number, because the mean of its divisors is an integer number (62169120).

Almost surely, 2^1543322645 is an apocalyptic number.

It is an amenable number.

1543322645 is a deficient number, since it is larger than the sum of its proper divisors (446089195).

1543322645 is a wasteful number, since it uses less digits than its factorization.

1543322645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965.

The product of its digits is 86400, while the sum is 35.

The square root of 1543322645 is about 39285.1453478284. The cubic root of 1543322645 is about 1155.6302713732.

The spelling of 1543322645 in words is "one billion, five hundred forty-three million, three hundred twenty-two thousand, six hundred forty-five".