864651523000 has 32 divisors (see below), whose sum is σ = 2023284566160. Its totient is φ = 345860608800.

The previous prime is 864651522989. The next prime is 864651523027. The reversal of 864651523000 is 325156468.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 432324762 + ... + 432326761.

Almost surely, 2^864651523000 is an apocalyptic number.

It is an amenable number.

864651523000 is an abundant number, since it is smaller than the sum of its proper divisors (1158633043160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864651523000 is a wasteful number, since it uses less digits than its factorization.

864651523000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864651544 (or 864651530 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 864651523000 its reverse (325156468), we get a palindrome (864976679468).

The spelling of 864651523000 in words is "eight hundred sixty-four billion, six hundred fifty-one million, five hundred twenty-three thousand".