865242849897 has 48 divisors (see below), whose sum is σ = 1323719080320. Its totient is φ = 543089836800.

The previous prime is 865242849883. The next prime is 865242849899. The reversal of 865242849897 is 798948242568.

865242849897 is a `hidden beast` number, since 8 + 6 + 5 + 2 + 42 + 8 + 498 + 97 = 666.

865242849897 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 865242849897 - 2⁸ = 865242849641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865242849899) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51277372 + ... + 51294242.

It is an arithmetic number, because the mean of its divisors is an integer number (27577480840).

Almost surely, 2^865242849897 is an apocalyptic number.

It is an amenable number.

865242849897 is a deficient number, since it is larger than the sum of its proper divisors (458476230423).

865242849897 is a wasteful number, since it uses less digits than its factorization.

865242849897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18734 (or 18731 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 72.

The spelling of 865242849897 in words is "eight hundred sixty-five billion, two hundred forty-two million, eight hundred forty-nine thousand, eight hundred ninety-seven".