1641322556 has 12 divisors (see below), whose sum is σ = 2939112792. Its totient is φ = 801576048.

The previous prime is 1641322519. The next prime is 1641322561. The reversal of 1641322556 is 6552231461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4771115 + ... + 4771458.

It is an arithmetic number, because the mean of its divisors is an integer number (244926066).

Almost surely, 2^1641322556 is an apocalyptic number.

It is an amenable number.

1641322556 is a deficient number, since it is larger than the sum of its proper divisors (1297790236).

1641322556 is a wasteful number, since it uses less digits than its factorization.

1641322556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542620 (or 9542618 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1641322556 is about 40513.2392681701. The cubic root of 1641322556 is about 1179.5906259720.

The spelling of 1641322556 in words is "one billion, six hundred forty-one million, three hundred twenty-two thousand, five hundred fifty-six".