1681255400 has 96 divisors (see below), whose sum is σ = 4345034400. Its totient is φ = 599788800.

The previous prime is 1681255391. The next prime is 1681255427. The reversal of 1681255400 is 45521861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109391 + ... + 123809.

It is an arithmetic number, because the mean of its divisors is an integer number (45260775).

Almost surely, 2^1681255400 is an apocalyptic number.

1681255400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681255400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2172517200).

1681255400 is an abundant number, since it is smaller than the sum of its proper divisors (2663779000).

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

1681255400 is a wasteful number, since it uses less digits than its factorization.

1681255400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14499 (or 14490 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1681255400 is about 41003.1145158511. The cubic root of 1681255400 is about 1189.0804279217.

The spelling of 1681255400 in words is "one billion, six hundred eighty-one million, two hundred fifty-five thousand, four hundred".