243471905954542 has 4 divisors (see below), whose sum is σ = 365207858931816. Its totient is φ = 121735952977270.

The previous prime is 243471905954533. The next prime is 243471905954561. The reversal of 243471905954542 is 245459509174342.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60867976488634 + ... + 60867976488637.

It is an arithmetic number, because the mean of its divisors is an integer number (91301964732954).

Almost surely, 2^{243471905954542} is an apocalyptic number.

243471905954542 is a deficient number, since it is larger than the sum of its proper divisors (121735952977274).

243471905954542 is a wasteful number, since it uses less digits than its factorization.

243471905954542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121735952977273.

The product of its (nonzero) digits is 217728000, while the sum is 64.

The spelling of 243471905954542 in words is "two hundred forty-three trillion, four hundred seventy-one billion, nine hundred five million, nine hundred fifty-four thousand, five hundred forty-two".