243540277872 has 20 divisors (see below), whose sum is σ = 629145717960. Its totient is φ = 81180092608.

The previous prime is 243540277861. The next prime is 243540277891. The reversal of 243540277872 is 278772045342.

It is a super-3 number, since 3×243540277872³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536877847 + ... + 2536877942.

It is an arithmetic number, because the mean of its divisors is an integer number (31457285898).

Almost surely, 2^243540277872 is an apocalyptic number.

It is an amenable number.

243540277872 is an abundant number, since it is smaller than the sum of its proper divisors (385605440088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243540277872 is a wasteful number, since it uses less digits than its factorization.

243540277872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073755800 (or 5073755794 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 51.

The spelling of 243540277872 in words is "two hundred forty-three billion, five hundred forty million, two hundred seventy-seven thousand, eight hundred seventy-two".