243666761000 has 128 divisors (see below), whose sum is σ = 640738425600. Its totient is φ = 86057452800.

The previous prime is 243666760957. The next prime is 243666761141. The reversal of 243666761000 is 167666342.

It is a super-2 number, since 2×243666761000² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108470 + ... + 706469.

It is an arithmetic number, because the mean of its divisors is an integer number (5005768950).

Almost surely, 2^243666761000 is an apocalyptic number.

243666761000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243666761000 is an abundant number, since it is smaller than the sum of its proper divisors (397071664600).

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

243666761000 is a wasteful number, since it uses less digits than its factorization.

243666761000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814996 (or 814982 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 243666761000 in words is "two hundred forty-three billion, six hundred sixty-six million, seven hundred sixty-one thousand".