187996425911 has 16 divisors (see below), whose sum is σ = 215658229248. Its totient is φ = 160536285600.

The previous prime is 187996425907. The next prime is 187996425917. The reversal of 187996425911 is 119524699781.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 187996425911 - 2² = 187996425907 is a prime.

It is a super-2 number, since 2×187996425911² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187996425917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6900326 + ... + 6927516.

It is an arithmetic number, because the mean of its divisors is an integer number (13478639328).

Almost surely, 2^187996425911 is an apocalyptic number.

187996425911 is a deficient number, since it is larger than the sum of its proper divisors (27661803337).

187996425911 is a wasteful number, since it uses less digits than its factorization.

187996425911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30862.

The product of its digits is 9797760, while the sum is 62.

The spelling of 187996425911 in words is "one hundred eighty-seven billion, nine hundred ninety-six million, four hundred twenty-five thousand, nine hundred eleven".