1802198561 has 8 divisors (see below), whose sum is σ = 1806991200. Its totient is φ = 1797413760.

The previous prime is 1802198549. The next prime is 1802198569. The reversal of 1802198561 is 1658912081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1802198561 - 2³⁰ = 728456737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1802198569) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 953105 + ... + 954993.

It is an arithmetic number, because the mean of its divisors is an integer number (225873900).

Almost surely, 2^1802198561 is an apocalyptic number.

It is an amenable number.

1802198561 is a deficient number, since it is larger than the sum of its proper divisors (4792639).

1802198561 is a wasteful number, since it uses less digits than its factorization.

1802198561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919.

The product of its (nonzero) digits is 34560, while the sum is 41.

The square root of 1802198561 is about 42452.3092540323. The cubic root of 1802198561 is about 1216.9354602801.

The spelling of 1802198561 in words is "one billion, eight hundred two million, one hundred ninety-eight thousand, five hundred sixty-one".