8645860820438 has 16 divisors (see below), whose sum is σ = 13038307375104. Its totient is φ = 4299763976040.

The previous prime is 8645860820357. The next prime is 8645860820447. The reversal of 8645860820438 is 8340280685468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689881 + ... + 4488587.

It is an arithmetic number, because the mean of its divisors is an integer number (814894210944).

Almost surely, 2^{8645860820438} is an apocalyptic number.

8645860820438 is a deficient number, since it is larger than the sum of its proper divisors (4392446554666).

8645860820438 is a wasteful number, since it uses less digits than its factorization.

8645860820438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806987.

The product of its (nonzero) digits is 70778880, while the sum is 62.

The spelling of 8645860820438 in words is "eight trillion, six hundred forty-five billion, eight hundred sixty million, eight hundred twenty thousand, four hundred thirty-eight".