243907840659 has 64 divisors (see below), whose sum is σ = 380076032000. Its totient is φ = 136265006592.

The previous prime is 243907840621. The next prime is 243907840661. The reversal of 243907840659 is 956048709342.

It is not a de Polignac number, because 243907840659 - 2⁸ = 243907840403 is a prime.

It is a super-2 number, since 2×243907840659² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243907840599 and 243907840608.

It is not an unprimeable number, because it can be changed into a prime (243907840679) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73619787 + ... + 73623099.

It is an arithmetic number, because the mean of its divisors is an integer number (5938688000).

Almost surely, 2^243907840659 is an apocalyptic number.

243907840659 is a deficient number, since it is larger than the sum of its proper divisors (136168191341).

243907840659 is a wasteful number, since it uses less digits than its factorization.

243907840659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824.

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 243907840659 in words is "two hundred forty-three billion, nine hundred seven million, eight hundred forty thousand, six hundred fifty-nine".