1622558961 has 27 divisors (see below), whose sum is σ = 2432554059. Its totient is φ = 1042150032.

The previous prime is 1622558929. The next prime is 1622558981. The reversal of 1622558961 is 1698552261.

The square root of 1622558961 is 40281.

It is a perfect power (a square), and thus also a powerful number.

1622558961 is a `hidden beast` number, since 1 + 6 + 2 + 2 + 5 + 589 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 850830561 + 771728400 = 29169^2 + 27780^2 .

It is not a de Polignac number, because 1622558961 - 2⁵ = 1622558929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1622558981) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3504216 + ... + 3504678.

Almost surely, 2^1622558961 is an apocalyptic number.

1622558961 is the 40281-st square number.

1622558961 is the 20141-st centered octagonal number.

It is an amenable number.

1622558961 is a deficient number, since it is larger than the sum of its proper divisors (809995098).

1622558961 is an frugal number, since it uses more digits than its factorization.

1622558961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 495 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The cubic root of 1622558961 is about 1175.0783616971.

The spelling of 1622558961 in words is "one billion, six hundred twenty-two million, five hundred fifty-eight thousand, nine hundred sixty-one".