243903612955 has 4 divisors (see below), whose sum is σ = 292684335552. Its totient is φ = 195122890360.

The previous prime is 243903612947. The next prime is 243903613013. The reversal of 243903612955 is 559216309342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 243903612955 - 2³ = 243903612947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243903612899 and 243903612908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24390361291 + ... + 24390361300.

It is an arithmetic number, because the mean of its divisors is an integer number (73171083888).

Almost surely, 2^243903612955 is an apocalyptic number.

243903612955 is a deficient number, since it is larger than the sum of its proper divisors (48780722597).

243903612955 is an equidigital number, since it uses as much as digits as its factorization.

243903612955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48780722596.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 243903612955 in words is "two hundred forty-three billion, nine hundred three million, six hundred twelve thousand, nine hundred fifty-five".