187997890208472 has 80 divisors (see below), whose sum is σ = 526581252997800. Its totient is φ = 62664405788160.

The previous prime is 187997890208467. The next prime is 187997890208497. The reversal of 187997890208472 is 274802098799781.

187997890208472 is a `hidden beast` number, since 1 + 8 + 79 + 9 + 78 + 9 + 0 + 2 + 0 + 8 + 472 = 666.

It is a super-3 number, since 3×187997890208472³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 187997890208391 and 187997890208400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22632072 + ... + 29802792.

Almost surely, 2^{187997890208472} is an apocalyptic number.

187997890208472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

187997890208472 is an abundant number, since it is smaller than the sum of its proper divisors (338583362789328).

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

187997890208472 is a wasteful number, since it uses less digits than its factorization.

187997890208472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211198 (or 7211185 counting only the distinct ones).

The product of its (nonzero) digits is 2048385024, while the sum is 81.

The spelling of 187997890208472 in words is "one hundred eighty-seven trillion, nine hundred ninety-seven billion, eight hundred ninety million, two hundred eight thousand, four hundred seventy-two".