1622161556 has 96 divisors (see below), whose sum is σ = 3281886720. Its totient is φ = 696729600.

The previous prime is 1622161547. The next prime is 1622161579. The reversal of 1622161556 is 6551612261.

It is a super-2 number, since 2×1622161556² = 5262816227528682272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5985701 + ... + 5985971.

It is an arithmetic number, because the mean of its divisors is an integer number (34186320).

Almost surely, 2^1622161556 is an apocalyptic number.

It is an amenable number.

1622161556 is an abundant number, since it is smaller than the sum of its proper divisors (1659725164).

1622161556 is a wasteful number, since it uses less digits than its factorization.

1622161556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 463 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 1622161556 is about 40276.0667890995. The cubic root of 1622161556 is about 1174.9824185690.

It can be divided in two parts, 16221 and 61556, that added together give a palindrome (77777).

The spelling of 1622161556 in words is "one billion, six hundred twenty-two million, one hundred sixty-one thousand, five hundred fifty-six".