1545220645 has 16 divisors (see below), whose sum is σ = 1917711360. Its totient is φ = 1194545664.

The previous prime is 1545220597. The next prime is 1545220667. The reversal of 1545220645 is 5460225451.

It is a cyclic number.

It is not a de Polignac number, because 1545220645 - 2⁹ = 1545220133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1545220645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23052 + ... + 60181.

It is an arithmetic number, because the mean of its divisors is an integer number (119856960).

Almost surely, 2^1545220645 is an apocalyptic number.

It is an amenable number.

1545220645 is a deficient number, since it is larger than the sum of its proper divisors (372490715).

1545220645 is an equidigital number, since it uses as much as digits as its factorization.

1545220645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83364.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 1545220645 is about 39309.2946388001. The cubic root of 1545220645 is about 1156.1038141163.

The spelling of 1545220645 in words is "one billion, five hundred forty-five million, two hundred twenty thousand, six hundred forty-five".