865899145785634 has 32 divisors (see below), whose sum is σ = 1342240358731776. Its totient is φ = 418516854330960.

The previous prime is 865899145785613. The next prime is 865899145785691. The reversal of 865899145785634 is 436587541998568.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037822659 + ... + 1038656665.

It is an arithmetic number, because the mean of its divisors is an integer number (41945011210368).

Almost surely, 2^{865899145785634} is an apocalyptic number.

865899145785634 is a deficient number, since it is larger than the sum of its proper divisors (476341212946142).

865899145785634 is a wasteful number, since it uses less digits than its factorization.

865899145785634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852670.

The product of its digits is 62705664000, while the sum is 88.

The spelling of 865899145785634 in words is "eight hundred sixty-five trillion, eight hundred ninety-nine billion, one hundred forty-five million, seven hundred eighty-five thousand, six hundred thirty-four".