864555847850 has 48 divisors (see below), whose sum is σ = 1663959749760. Its totient is φ = 333984604800.

The previous prime is 864555847843. The next prime is 864555847867. The reversal of 864555847850 is 58748555468.

It is a happy number.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2067746 + ... + 2450445.

It is an arithmetic number, because the mean of its divisors is an integer number (34665828120).

Almost surely, 2^864555847850 is an apocalyptic number.

864555847850 is a deficient number, since it is larger than the sum of its proper divisors (799403901910).

864555847850 is a wasteful number, since it uses less digits than its factorization.

864555847850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518335 (or 4518330 counting only the distinct ones).

The product of its (nonzero) digits is 215040000, while the sum is 65.

The spelling of 864555847850 in words is "eight hundred sixty-four billion, five hundred fifty-five million, eight hundred forty-seven thousand, eight hundred fifty".