864820814275 has 24 divisors (see below), whose sum is σ = 1170943340544. Its totient is φ = 628381754400.

The previous prime is 864820814267. The next prime is 864820814293. The reversal of 864820814275 is 572418028468.

864820814275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 864820814275 - 2³ = 864820814267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

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, 1147627 + ... + 1745476.

It is an arithmetic number, because the mean of its divisors is an integer number (48789305856).

Almost surely, 2^864820814275 is an apocalyptic number.

864820814275 is a deficient number, since it is larger than the sum of its proper divisors (306122526269).

864820814275 is a wasteful number, since it uses less digits than its factorization.

864820814275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894211 (or 2894206 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 55.

The spelling of 864820814275 in words is "eight hundred sixty-four billion, eight hundred twenty million, eight hundred fourteen thousand, two hundred seventy-five".