68181912001 has 4 divisors (see below), whose sum is σ = 77922185152. Its totient is φ = 58441638852.

The previous prime is 68181911999. The next prime is 68181912037. The reversal of 68181912001 is 10021918186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68181912001 - 2¹ = 68181911999 is a prime.

It is a super-3 number, since 3×68181912001³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (68181942001) 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, 4870136565 + ... + 4870136578.

It is an arithmetic number, because the mean of its divisors is an integer number (19480546288).

Almost surely, 2^68181912001 is an apocalyptic number.

It is an amenable number.

68181912001 is a deficient number, since it is larger than the sum of its proper divisors (9740273151).

68181912001 is an equidigital number, since it uses as much as digits as its factorization.

68181912001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9740273150.

The product of its (nonzero) digits is 6912, while the sum is 37.

The spelling of 68181912001 in words is "sixty-eight billion, one hundred eighty-one million, nine hundred twelve thousand, one".