187861860186372 has 72 divisors (see below), whose sum is σ = 491767699917312. Its totient is φ = 60405742713600.

The previous prime is 187861860186361. The next prime is 187861860186401. The reversal of 187861860186372 is 273681068168781.

It is a happy number.

187861860186372 is a `hidden beast` number, since 1 + 8 + 7 + 8 + 6 + 1 + 8 + 601 + 8 + 6 + 3 + 7 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 187861860186372.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270287973 + ... + 270982124.

It is an arithmetic number, because the mean of its divisors is an integer number (6830106943296).

Almost surely, 2^{187861860186372} is an apocalyptic number.

187861860186372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

187861860186372 is an abundant number, since it is smaller than the sum of its proper divisors (303905839730940).

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

187861860186372 is a wasteful number, since it uses less digits than its factorization.

187861860186372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541270449 (or 541270444 counting only the distinct ones).

The product of its (nonzero) digits is 260112384, while the sum is 72.

The spelling of 187861860186372 in words is "one hundred eighty-seven trillion, eight hundred sixty-one billion, eight hundred sixty million, one hundred eighty-six thousand, three hundred seventy-two".