188188751661011 has 4 divisors (see below), whose sum is σ = 188188873089000. Its totient is φ = 188188630233024.

The previous prime is 188188751660983. The next prime is 188188751661073. The reversal of 188188751661011 is 110166157881881.

188188751661011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188188751661011 is a prime.

It is a super-2 number, since 2×188188751661011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188188751660011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58358846 + ... + 61499043.

It is an arithmetic number, because the mean of its divisors is an integer number (47047218272250).

Almost surely, 2^{188188751661011} is an apocalyptic number.

188188751661011 is a deficient number, since it is larger than the sum of its proper divisors (121427989).

188188751661011 is a wasteful number, since it uses less digits than its factorization.

188188751661011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121427988.

The product of its (nonzero) digits is 5160960, while the sum is 62.

The spelling of 188188751661011 in words is "one hundred eighty-eight trillion, one hundred eighty-eight billion, seven hundred fifty-one million, six hundred sixty-one thousand, eleven".