1641485128 has 16 divisors (see below), whose sum is σ = 3108259260. Its totient is φ = 812616000.

The previous prime is 1641485089. The next prime is 1641485129. The reversal of 1641485128 is 8215841461.

It can be written as a sum of positive squares in 2 ways, for example, as 1640088004 + 1397124 = 40498^2 + 1182^2 .

It is not an unprimeable number, because it can be changed into a prime (1641485129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014963 + ... + 1016578.

Almost surely, 2^1641485128 is an apocalyptic number.

It is an amenable number.

1641485128 is a deficient number, since it is larger than the sum of its proper divisors (1466774132).

1641485128 is a wasteful number, since it uses less digits than its factorization.

1641485128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031648 (or 2031644 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 1641485128 is about 40515.2456243326. The cubic root of 1641485128 is about 1179.6295705974.

The spelling of 1641485128 in words is "one billion, six hundred forty-one million, four hundred eighty-five thousand, one hundred twenty-eight".