243645055511 has 24 divisors (see below), whose sum is σ = 288683349120. Its totient is φ = 203839178400.

The previous prime is 243645055501. The next prime is 243645055517. The reversal of 243645055511 is 115550546342.

It is not a de Polignac number, because 243645055511 - 2²² = 243640861207 is a prime.

It is a super-2 number, since 2×243645055511² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243645055517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 417350 + ... + 813308.

It is an arithmetic number, because the mean of its divisors is an integer number (12028472880).

Almost surely, 2^243645055511 is an apocalyptic number.

243645055511 is a deficient number, since it is larger than the sum of its proper divisors (45038293609).

243645055511 is a wasteful number, since it uses less digits than its factorization.

243645055511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396327 (or 396314 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 243645055511 in words is "two hundred forty-three billion, six hundred forty-five million, fifty-five thousand, five hundred eleven".