243500614561 has 16 divisors (see below), whose sum is σ = 260993098240. Its totient is φ = 226504149120.

The previous prime is 243500614549. The next prime is 243500614597. The reversal of 243500614561 is 165416005342.

It is a cyclic number.

It is not a de Polignac number, because 243500614561 - 2⁷ = 243500614433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243500614561.

It is not an unprimeable number, because it can be changed into a prime (243500614531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84330 + ... + 702931.

It is an arithmetic number, because the mean of its divisors is an integer number (16312068640).

Almost surely, 2^243500614561 is an apocalyptic number.

It is an amenable number.

243500614561 is a deficient number, since it is larger than the sum of its proper divisors (17492483679).

243500614561 is a wasteful number, since it uses less digits than its factorization.

243500614561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787576.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 243500614561 in words is "two hundred forty-three billion, five hundred million, six hundred fourteen thousand, five hundred sixty-one".