187681379885 has 16 divisors (see below), whose sum is σ = 235040697216. Its totient is φ = 143598130368.

The previous prime is 187681379867. The next prime is 187681379923. The reversal of 187681379885 is 588973186781.

It is a cyclic number.

It is not a de Polignac number, because 187681379885 - 2⁸ = 187681379629 is a prime.

It is a super-2 number, since 2×187681379885² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802262 + ... + 1009448.

It is an arithmetic number, because the mean of its divisors is an integer number (14690043576).

Almost surely, 2^187681379885 is an apocalyptic number.

It is an amenable number.

187681379885 is a deficient number, since it is larger than the sum of its proper divisors (47359317331).

187681379885 is a wasteful number, since it uses less digits than its factorization.

187681379885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215092.

The product of its digits is 162570240, while the sum is 71.

The spelling of 187681379885 in words is "one hundred eighty-seven billion, six hundred eighty-one million, three hundred seventy-nine thousand, eight hundred eighty-five".