243253655106 has 96 divisors (see below), whose sum is σ = 613688659584. Its totient is φ = 62920281600.

The previous prime is 243253655087. The next prime is 243253655111. The reversal of 243253655106 is 601556352342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1125456 + ... + 1324068.

It is an arithmetic number, because the mean of its divisors is an integer number (6392590204).

Almost surely, 2^243253655106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243253655106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306844329792).

243253655106 is an abundant number, since it is smaller than the sum of its proper divisors (370435004478).

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

243253655106 is a wasteful number, since it uses less digits than its factorization.

243253655106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198888 (or 198877 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 243253655106 in words is "two hundred forty-three billion, two hundred fifty-three million, six hundred fifty-five thousand, one hundred six".