194388370872 has 32 divisors (see below), whose sum is σ = 511548345600. Its totient is φ = 61385801184.

The previous prime is 194388370843. The next prime is 194388370889. The reversal of 194388370872 is 278073883491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213144688 + ... + 213145599.

It is an arithmetic number, because the mean of its divisors is an integer number (15985885800).

Almost surely, 2^194388370872 is an apocalyptic number.

194388370872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

194388370872 is an abundant number, since it is smaller than the sum of its proper divisors (317159974728).

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

194388370872 is a wasteful number, since it uses less digits than its factorization.

194388370872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426290315 (or 426290311 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 194388370872 in words is "one hundred ninety-four billion, three hundred eighty-eight million, three hundred seventy thousand, eight hundred seventy-two".