68545891943 has 8 divisors (see below), whose sum is σ = 70231786800. Its totient is φ = 66860665920.

The previous prime is 68545891927. The next prime is 68545891957. The reversal of 68545891943 is 34919854586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68545891943 - 2⁴ = 68545891927 is a prime.

It is a super-2 number, since 2×68545891943² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68545891903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43508 + ... + 372806.

It is an arithmetic number, because the mean of its divisors is an integer number (8778973350).

Almost surely, 2^68545891943 is an apocalyptic number.

68545891943 is a deficient number, since it is larger than the sum of its proper divisors (1685894857).

68545891943 is a wasteful number, since it uses less digits than its factorization.

68545891943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334417.

The product of its digits is 37324800, while the sum is 62.

The spelling of 68545891943 in words is "sixty-eight billion, five hundred forty-five million, eight hundred ninety-one thousand, nine hundred forty-three".