243261642250 has 64 divisors (see below), whose sum is σ = 512809989120. Its totient is φ = 85605240000.

The previous prime is 243261642191. The next prime is 243261642277. The reversal of 243261642250 is 52246162342.

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, 1341505 + ... + 1512004.

It is an arithmetic number, because the mean of its divisors is an integer number (8012656080).

Almost surely, 2^243261642250 is an apocalyptic number.

243261642250 is an abundant number, since it is smaller than the sum of its proper divisors (269548346870).

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

243261642250 is a wasteful number, since it uses less digits than its factorization.

243261642250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853568 (or 2853558 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 243261642250 in words is "two hundred forty-three billion, two hundred sixty-one million, six hundred forty-two thousand, two hundred fifty".