1998545453 has 8 divisors (see below), whose sum is σ = 2011370400. Its totient is φ = 1985761008.

The previous prime is 1998545447. The next prime is 1998545467. The reversal of 1998545453 is 3545458991.

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 1998545453 - 2⁶ = 1998545389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1998545395 and 1998545404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998545953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92150 + ... + 111752.

It is an arithmetic number, because the mean of its divisors is an integer number (251421300).

Almost surely, 2^1998545453 is an apocalyptic number.

It is an amenable number.

1998545453 is a deficient number, since it is larger than the sum of its proper divisors (12824947).

1998545453 is a wasteful number, since it uses less digits than its factorization.

1998545453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20251.

The product of its digits is 3888000, while the sum is 53.

The square root of 1998545453 is about 44705.0942622874. The cubic root of 1998545453 is about 1259.6155400893.

The spelling of 1998545453 in words is "one billion, nine hundred ninety-eight million, five hundred forty-five thousand, four hundred fifty-three".