1998552455 has 16 divisors (see below), whose sum is σ = 2543569344. Its totient is φ = 1504250880.

The previous prime is 1998552433. The next prime is 1998552467. The reversal of 1998552455 is 5542558991.

It is a de Polignac number, because none of the positive numbers 2^k-1998552455 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1998552397 and 1998552406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135434 + ... + 149463.

It is an arithmetic number, because the mean of its divisors is an integer number (158973084).

Almost surely, 2^1998552455 is an apocalyptic number.

1998552455 is a deficient number, since it is larger than the sum of its proper divisors (545016889).

1998552455 is a wasteful number, since it uses less digits than its factorization.

1998552455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284986.

The product of its digits is 3240000, while the sum is 53.

The square root of 1998552455 is about 44705.1725754414. The cubic root of 1998552455 is about 1259.6170111287.

The spelling of 1998552455 in words is "one billion, nine hundred ninety-eight million, five hundred fifty-two thousand, four hundred fifty-five".