187935890652 has 72 divisors (see below), whose sum is σ = 488381030592. Its totient is φ = 60892041600.

The previous prime is 187935890641. The next prime is 187935890671. The reversal of 187935890652 is 256098539781.

It is a self number, because there is not a number n which added to its sum of digits gives 187935890652.

It is a congruent number.

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, 1290877 + ... + 1429067.

Almost surely, 2^187935890652 is an apocalyptic number.

187935890652 is a gapful number since it is divisible by the number (12) 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 187935890652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244190515296).

187935890652 is an abundant number, since it is smaller than the sum of its proper divisors (300445139940).

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

187935890652 is a wasteful number, since it uses less digits than its factorization.

187935890652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139259 (or 139254 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 187935890652 in words is "one hundred eighty-seven billion, nine hundred thirty-five million, eight hundred ninety thousand, six hundred fifty-two".