6812123645 has 8 divisors (see below), whose sum is σ = 8175020256. Its totient is φ = 5449384336.

The previous prime is 6812123641. The next prime is 6812123651. The reversal of 6812123645 is 5463212186.

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 6812123645 - 2² = 6812123641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6812123599 and 6812123608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6812123641) 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, 102374 + ... + 155256.

It is an arithmetic number, because the mean of its divisors is an integer number (1021877532).

Almost surely, 2^6812123645 is an apocalyptic number.

It is an amenable number.

6812123645 is a deficient number, since it is larger than the sum of its proper divisors (1362896611).

6812123645 is a wasteful number, since it uses less digits than its factorization.

6812123645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78651.

The product of its digits is 69120, while the sum is 38.

The square root of 6812123645 is about 82535.5901717556. The cubic root of 6812123645 is about 1895.6617219675.

The spelling of 6812123645 in words is "six billion, eight hundred twelve million, one hundred twenty-three thousand, six hundred forty-five".