1641089800 has 48 divisors (see below), whose sum is σ = 4360613760. Its totient is φ = 562658880.

The previous prime is 1641089761. The next prime is 1641089839. The reversal of 1641089800 is 89801461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1641089761) and next prime (1641089839).

It is a self number, because there is not a number n which added to its sum of digits gives 1641089800.

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 11 ways as a sum of consecutive naturals, for example, 584704 + ... + 587503.

It is an arithmetic number, because the mean of its divisors is an integer number (90846120).

Almost surely, 2^1641089800 is an apocalyptic number.

1641089800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641089800 is an abundant number, since it is smaller than the sum of its proper divisors (2719523960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641089800 is a wasteful number, since it uses less digits than its factorization.

1641089800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172230 (or 1172221 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1641089800 is about 40510.3665744955. The cubic root of 1641089800 is about 1179.5348640756.

The spelling of 1641089800 in words is "one billion, six hundred forty-one million, eighty-nine thousand, eight hundred".