638061873803460 has 96 divisors (see below), whose sum is σ = 2004354020148480. Its totient is φ = 168497892873216.

The previous prime is 638061873803447. The next prime is 638061873803477. The reversal of 638061873803460 is 64308378160836.

638061873803460 is a `hidden beast` number, since 6 + 3 + 8 + 0 + 61 + 87 + 38 + 0 + 3 + 460 = 666.

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 in 31 ways as a sum of consecutive naturals, for example, 5735847597 + ... + 5735958836.

It is an arithmetic number, because the mean of its divisors is an integer number (20878687709880).

Almost surely, 2^{638061873803460} is an apocalyptic number.

638061873803460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638061873803460 is an abundant number, since it is smaller than the sum of its proper divisors (1366292146345020).

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

638061873803460 is a wasteful number, since it uses less digits than its factorization.

638061873803460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471806554 (or 11471806546 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 63.

The spelling of 638061873803460 in words is "six hundred thirty-eight trillion, sixty-one billion, eight hundred seventy-three million, eight hundred three thousand, four hundred sixty".