243247656897 has 48 divisors (see below), whose sum is σ = 404257451520. Its totient is φ = 138065026176.

The previous prime is 243247656853. The next prime is 243247656901. The reversal of 243247656897 is 798656742342.

243247656897 is a `hidden beast` number, since 2 + 4 + 32 + 476 + 56 + 89 + 7 = 666.

It is not a de Polignac number, because 243247656897 - 2¹⁴ = 243247640513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (243247666897) 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, 5957283 + ... + 5997975.

It is an arithmetic number, because the mean of its divisors is an integer number (8422030240).

Almost surely, 2^243247656897 is an apocalyptic number.

It is an amenable number.

243247656897 is a deficient number, since it is larger than the sum of its proper divisors (161009794623).

243247656897 is a wasteful number, since it uses less digits than its factorization.

243247656897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41342 (or 41339 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 63.

The spelling of 243247656897 in words is "two hundred forty-three billion, two hundred forty-seven million, six hundred fifty-six thousand, eight hundred ninety-seven".