1984881663 has 6 divisors (see below), whose sum is σ = 2867051304. Its totient is φ = 1323254436.

The previous prime is 1984881653. The next prime is 1984881707. The reversal of 1984881663 is 3661884891.

1984881663 is a `hidden beast` number, since 1 + 98 + 488 + 16 + 63 = 666.

It is not a de Polignac number, because 1984881663 - 2³⁰ = 911139839 is a prime.

It is a super-2 number, since 2×1984881663² = 7879510432227291138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984881643) 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, 110271195 + ... + 110271212.

It is an arithmetic number, because the mean of its divisors is an integer number (477841884).

Almost surely, 2^1984881663 is an apocalyptic number.

1984881663 is a deficient number, since it is larger than the sum of its proper divisors (882169641).

1984881663 is a wasteful number, since it uses less digits than its factorization.

1984881663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220542413 (or 220542410 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1984881663 is about 44552.0107627030. The cubic root of 1984881663 is about 1256.7383650512.

The spelling of 1984881663 in words is "one billion, nine hundred eighty-four million, eight hundred eighty-one thousand, six hundred sixty-three".