2068546781 has 8 divisors (see below), whose sum is σ = 2365017984. Its totient is φ = 1772316720.

The previous prime is 2068546759. The next prime is 2068546817. The reversal of 2068546781 is 1876458602.

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 2068546781 - 2⁶ = 2068546717 is a prime.

It is a super-2 number, since 2×2068546781² = 8557771570370923922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2068546721) 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, 41510 + ... + 76551.

It is an arithmetic number, because the mean of its divisors is an integer number (295627248).

Almost surely, 2^2068546781 is an apocalyptic number.

It is an amenable number.

2068546781 is a deficient number, since it is larger than the sum of its proper divisors (296471203).

2068546781 is a wasteful number, since it uses less digits than its factorization.

2068546781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120571.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2068546781 is about 45481.2794564973. The cubic root of 2068546781 is about 1274.1535904327.

The spelling of 2068546781 in words is "two billion, sixty-eight million, five hundred forty-six thousand, seven hundred eighty-one".