187945422720 has 128 divisors (see below), whose sum is σ = 653537566080. Its totient is φ = 45562521600.

The previous prime is 187945422667. The next prime is 187945422739. The reversal of 187945422720 is 27224549781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 4428346 + ... + 4470585.

It is an arithmetic number, because the mean of its divisors is an integer number (5105762235).

Almost surely, 2^187945422720 is an apocalyptic number.

187945422720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187945422720 is an abundant number, since it is smaller than the sum of its proper divisors (465592143360).

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

187945422720 is a wasteful number, since it uses less digits than its factorization.

187945422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8898964 (or 8898952 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 187945422720 in words is "one hundred eighty-seven billion, nine hundred forty-five million, four hundred twenty-two thousand, seven hundred twenty".