243115511545 has 8 divisors (see below), whose sum is σ = 291781538496. Its totient is φ = 194463792816.

The previous prime is 243115511539. The next prime is 243115511557. The reversal of 243115511545 is 545115511342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243115511545 - 2⁹ = 243115511033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3539637 + ... + 3607666.

It is an arithmetic number, because the mean of its divisors is an integer number (36472692312).

Almost surely, 2^243115511545 is an apocalyptic number.

It is an amenable number.

243115511545 is a deficient number, since it is larger than the sum of its proper divisors (48666026951).

243115511545 is an equidigital number, since it uses as much as digits as its factorization.

243115511545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154111.

The product of its digits is 60000, while the sum is 37.

The spelling of 243115511545 in words is "two hundred forty-three billion, one hundred fifteen million, five hundred eleven thousand, five hundred forty-five".