194659013840 has 80 divisors (see below), whose sum is σ = 460101176640. Its totient is φ = 76580505600.

The previous prime is 194659013827. The next prime is 194659013851. The reversal of 194659013840 is 48310956491.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×194659013840² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1108040 + ... + 1271640.

It is an arithmetic number, because the mean of its divisors is an integer number (5751264708).

Almost surely, 2^194659013840 is an apocalyptic number.

194659013840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194659013840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230050588320).

194659013840 is an abundant number, since it is smaller than the sum of its proper divisors (265442162800).

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

194659013840 is a wasteful number, since it uses less digits than its factorization.

194659013840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163860 (or 163854 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 194659013840 in words is "one hundred ninety-four billion, six hundred fifty-nine million, thirteen thousand, eight hundred forty".