187978788882 has 16 divisors (see below), whose sum is σ = 417730642080. Its totient is φ = 62659596276.

The previous prime is 187978788841. The next prime is 187978788901. The reversal of 187978788882 is 288887879781.

It is a happy 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, 1740544288 + ... + 1740544395.

It is an arithmetic number, because the mean of its divisors is an integer number (26108165130).

Almost surely, 2^187978788882 is an apocalyptic number.

187978788882 is an abundant number, since it is smaller than the sum of its proper divisors (229751853198).

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

187978788882 is a wasteful number, since it uses less digits than its factorization.

187978788882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481088694 (or 3481088688 counting only the distinct ones).

The product of its digits is 1618477056, while the sum is 81.

The spelling of 187978788882 in words is "one hundred eighty-seven billion, nine hundred seventy-eight million, seven hundred eighty-eight thousand, eight hundred eighty-two".