1641298900 has 18 divisors (see below), whose sum is σ = 3561618830. Its totient is φ = 656519520.

The previous prime is 1641298871. The next prime is 1641298903. The reversal of 1641298900 is 98921461.

It can be written as a sum of positive squares in 3 ways, for example, as 229643716 + 1411655184 = 15154^2 + 37572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641298903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8206395 + ... + 8206594.

Almost surely, 2^1641298900 is an apocalyptic number.

1641298900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641298900 is an abundant number, since it is smaller than the sum of its proper divisors (1920319930).

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

1641298900 is a wasteful number, since it uses less digits than its factorization.

1641298900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16413003 (or 16412996 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1641298900 is about 40512.9473131738. The cubic root of 1641298900 is about 1179.5849588897.

The spelling of 1641298900 in words is "one billion, six hundred forty-one million, two hundred ninety-eight thousand, nine hundred".