243115553045 has 24 divisors (see below), whose sum is σ = 319185812952. Its totient is φ = 177146757120.

The previous prime is 243115553041. The next prime is 243115553059. The reversal of 243115553045 is 540355511342.

It can be written as a sum of positive squares in 4 ways, for example, as 82724113924 + 160391439121 = 287618^2 + 400489^2 .

It is not a de Polignac number, because 243115553045 - 2² = 243115553041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115553041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1406444 + ... + 1569813.

It is an arithmetic number, because the mean of its divisors is an integer number (13299408873).

Almost surely, 2^243115553045 is an apocalyptic number.

It is an amenable number.

243115553045 is a deficient number, since it is larger than the sum of its proper divisors (76070259907).

243115553045 is a wasteful number, since it uses less digits than its factorization.

243115553045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976341 (or 2976310 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 243115553045 in words is "two hundred forty-three billion, one hundred fifteen million, five hundred fifty-three thousand, forty-five".