188987045687 has 16 divisors (see below), whose sum is σ = 207047643264. Its totient is φ = 171073500000.

The previous prime is 188987045683. The next prime is 188987045701. The reversal of 188987045687 is 786540789881.

It is a cyclic number.

It is not a de Polignac number, because 188987045687 - 2² = 188987045683 is a prime.

It is a super-2 number, since 2×188987045687² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188987045687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188987045683) 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, 12834053 + ... + 12848769.

It is an arithmetic number, because the mean of its divisors is an integer number (12940477704).

Almost surely, 2^188987045687 is an apocalyptic number.

188987045687 is a deficient number, since it is larger than the sum of its proper divisors (18060597577).

188987045687 is a wasteful number, since it uses less digits than its factorization.

188987045687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19630.

The product of its (nonzero) digits is 216760320, while the sum is 71.

The spelling of 188987045687 in words is "one hundred eighty-eight billion, nine hundred eighty-seven million, forty-five thousand, six hundred eighty-seven".