1631485998 has 24 divisors (see below), whose sum is σ = 3535691328. Its totient is φ = 543704832.

The previous prime is 1631485969. The next prime is 1631486023. The reversal of 1631485998 is 8995841361.

1631485998 is a `hidden beast` number, since 1 + 6 + 3 + 1 + 48 + 599 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106915 + ... + 121217.

It is an arithmetic number, because the mean of its divisors is an integer number (147320472).

Almost surely, 2^1631485998 is an apocalyptic number.

1631485998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1631485998 is an abundant number, since it is smaller than the sum of its proper divisors (1904205330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631485998 is a wasteful number, since it uses less digits than its factorization.

1631485998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20648 (or 20645 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1631485998 is about 40391.6575297425. The cubic root of 1631485998 is about 1177.2294470832.

The spelling of 1631485998 in words is "one billion, six hundred thirty-one million, four hundred eighty-five thousand, nine hundred ninety-eight".