1545632563 has 4 divisors (see below), whose sum is σ = 1547215560. Its totient is φ = 1544049568.

The previous prime is 1545632519. The next prime is 1545632573. The reversal of 1545632563 is 3652365451.

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

It is a cyclic number.

It is not a de Polignac number, because 1545632563 - 2²⁵ = 1512078131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1545632513) 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, 790033 + ... + 791986.

It is an arithmetic number, because the mean of its divisors is an integer number (386803890).

Almost surely, 2^1545632563 is an apocalyptic number.

1545632563 is a deficient number, since it is larger than the sum of its proper divisors (1582997).

1545632563 is an equidigital number, since it uses as much as digits as its factorization.

1545632563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582996.

The product of its digits is 324000, while the sum is 40.

The square root of 1545632563 is about 39314.5337375378. The cubic root of 1545632563 is about 1156.2065346485.

The spelling of 1545632563 in words is "one billion, five hundred forty-five million, six hundred thirty-two thousand, five hundred sixty-three".