187805797468638 has 16 divisors (see below), whose sum is σ = 375668826708096. Its totient is φ = 62592393861080.

The previous prime is 187805797468637. The next prime is 187805797468651. The reversal of 187805797468638 is 836864797508781.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187805797468637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2384614458 + ... + 2384693213.

It is an arithmetic number, because the mean of its divisors is an integer number (23479301669256).

Almost surely, 2^{187805797468638} is an apocalyptic number.

187805797468638 is an abundant number, since it is smaller than the sum of its proper divisors (187863029239458).

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

187805797468638 is a wasteful number, since it uses less digits than its factorization.

187805797468638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769314239.

The product of its (nonzero) digits is 27311800320, while the sum is 87.

The spelling of 187805797468638 in words is "one hundred eighty-seven trillion, eight hundred five billion, seven hundred ninety-seven million, four hundred sixty-eight thousand, six hundred thirty-eight".