7868523845 has 16 divisors (see below), whose sum is σ = 11621205120. Its totient is φ = 4980515904.

The previous prime is 7868523841. The next prime is 7868523851. The reversal of 7868523845 is 5483258687.

It is a happy number.

It is not a de Polignac number, because 7868523845 - 2² = 7868523841 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868523841) 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, 8646275 + ... + 8647184.

It is an arithmetic number, because the mean of its divisors is an integer number (726325320).

Almost surely, 2^7868523845 is an apocalyptic number.

It is an amenable number.

7868523845 is a deficient number, since it is larger than the sum of its proper divisors (3752681275).

7868523845 is a wasteful number, since it uses less digits than its factorization.

7868523845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17293484.

The product of its digits is 12902400, while the sum is 56.

The square root of 7868523845 is about 88704.7002418699. The cubic root of 7868523845 is about 1988.9830789041.

The spelling of 7868523845 in words is "seven billion, eight hundred sixty-eight million, five hundred twenty-three thousand, eight hundred forty-five".