194984085640 has 32 divisors (see below), whose sum is σ = 453842271000. Its totient is φ = 75304198144.

The previous prime is 194984085613. The next prime is 194984085677. The reversal of 194984085640 is 46580489491.

It can be written as a sum of positive squares in 4 ways, for example, as 170649957604 + 24334128036 = 413098^2 + 155994^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84043705 + ... + 84046024.

Almost surely, 2^194984085640 is an apocalyptic number.

194984085640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194984085640 is an abundant number, since it is smaller than the sum of its proper divisors (258858185360).

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

194984085640 is a wasteful number, since it uses less digits than its factorization.

194984085640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168089769 (or 168089765 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 194984085640 in words is "one hundred ninety-four billion, nine hundred eighty-four million, eighty-five thousand, six hundred forty".