243522645553 has 32 divisors (see below), whose sum is σ = 283488076800. Its totient is φ = 207004459200.

The previous prime is 243522645481. The next prime is 243522645557. The reversal of 243522645553 is 355546225342.

It is a de Polignac number, because none of the positive numbers 2^k-243522645553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243522645557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2626363 + ... + 2717503.

It is an arithmetic number, because the mean of its divisors is an integer number (8859002400).

Almost surely, 2^243522645553 is an apocalyptic number.

243522645553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

243522645553 is a deficient number, since it is larger than the sum of its proper divisors (39965431247).

243522645553 is a wasteful number, since it uses less digits than its factorization.

243522645553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91413.

The product of its digits is 4320000, while the sum is 46.

The spelling of 243522645553 in words is "two hundred forty-three billion, five hundred twenty-two million, six hundred forty-five thousand, five hundred fifty-three".