187494733980 has 144 divisors (see below), whose sum is σ = 572995358208. Its totient is φ = 49624560000.

The previous prime is 187494733963. The next prime is 187494733999. The reversal of 187494733980 is 89337494781.

187494733980 is a `hidden beast` number, since 1 + 8 + 74 + 9 + 473 + 3 + 98 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42697585 + ... + 42701975.

It is an arithmetic number, because the mean of its divisors is an integer number (3979134432).

Almost surely, 2^187494733980 is an apocalyptic number.

187494733980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187494733980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286497679104).

187494733980 is an abundant number, since it is smaller than the sum of its proper divisors (385500624228).

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

187494733980 is a wasteful number, since it uses less digits than its factorization.

187494733980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128 (or 6123 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 187494733980 in words is "one hundred eighty-seven billion, four hundred ninety-four million, seven hundred thirty-three thousand, nine hundred eighty".