68100189891 has 16 divisors (see below), whose sum is σ = 96162277248. Its totient is φ = 42720272000.

The previous prime is 68100189863. The next prime is 68100189907. The reversal of 68100189891 is 19898100186.

It is a cyclic number.

It is not a de Polignac number, because 68100189891 - 2¹⁸ = 68099927747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (68100189821) 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, 96916 + ... + 381566.

It is an arithmetic number, because the mean of its divisors is an integer number (6010142328).

Almost surely, 2^68100189891 is an apocalyptic number.

68100189891 is a deficient number, since it is larger than the sum of its proper divisors (28062087357).

68100189891 is a wasteful number, since it uses less digits than its factorization.

68100189891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289362.

The product of its (nonzero) digits is 248832, while the sum is 51.

The spelling of 68100189891 in words is "sixty-eight billion, one hundred million, one hundred eighty-nine thousand, eight hundred ninety-one".