1601841998 has 4 divisors (see below), whose sum is σ = 2402763000. Its totient is φ = 800920998.

The previous prime is 1601841973. The next prime is 1601842019. The reversal of 1601841998 is 8991481061.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400460498 + ... + 400460501.

It is an arithmetic number, because the mean of its divisors is an integer number (600690750).

Almost surely, 2^1601841998 is an apocalyptic number.

1601841998 is a deficient number, since it is larger than the sum of its proper divisors (800921002).

1601841998 is an equidigital number, since it uses as much as digits as its factorization.

1601841998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800921001.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 1601841998 is about 40023.0183519434. The cubic root of 1601841998 is about 1170.0557593900.

The spelling of 1601841998 in words is "one billion, six hundred one million, eight hundred forty-one thousand, nine hundred ninety-eight".