1622545561 has 24 divisors (see below), whose sum is σ = 2020566464. Its totient is φ = 1268784000.

The previous prime is 1622545559. The next prime is 1622545567. The reversal of 1622545561 is 1655452261.

It is not a de Polignac number, because 1622545561 - 2¹ = 1622545559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1622545561.

It is not an unprimeable number, because it can be changed into a prime (1622545567) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 719686 + ... + 721936.

Almost surely, 2^1622545561 is an apocalyptic number.

It is an amenable number.

1622545561 is a deficient number, since it is larger than the sum of its proper divisors (398020903).

1622545561 is an equidigital number, since it uses as much as digits as its factorization.

1622545561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2360 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 1622545561 is about 40280.8336681355. The cubic root of 1622545561 is about 1175.0751268699.

The spelling of 1622545561 in words is "one billion, six hundred twenty-two million, five hundred forty-five thousand, five hundred sixty-one".