1622161555 has 16 divisors (see below), whose sum is σ = 2247618240. Its totient is φ = 1100869632.

The previous prime is 1622161547. The next prime is 1622161579. The reversal of 1622161555 is 5551612261.

It is a cyclic number.

It is not a de Polignac number, because 1622161555 - 2³ = 1622161547 is a prime.

It is a super-2 number, since 2×1622161555² = 5262816221040036050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1622161555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235510 + ... + 242299.

It is an arithmetic number, because the mean of its divisors is an integer number (140476140).

Almost surely, 2^1622161555 is an apocalyptic number.

1622161555 is a deficient number, since it is larger than the sum of its proper divisors (625456685).

1622161555 is an equidigital number, since it uses as much as digits as its factorization.

1622161555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477918.

The product of its digits is 18000, while the sum is 34.

The square root of 1622161555 is about 40276.0667766851. The cubic root of 1622161555 is about 1174.9824183275.

The spelling of 1622161555 in words is "one billion, six hundred twenty-two million, one hundred sixty-one thousand, five hundred fifty-five".