18415563538241 has 16 divisors (see below), whose sum is σ = 18526191796224. Its totient is φ = 18305288190144.

The previous prime is 18415563538201. The next prime is 18415563538321. The reversal of 18415563538241 is 14283536551481.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18415563538241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18415563538201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609832355 + ... + 609862551.

It is an arithmetic number, because the mean of its divisors is an integer number (1157886987264).

Almost surely, 2^{18415563538241} is an apocalyptic number.

It is an amenable number.

18415563538241 is a deficient number, since it is larger than the sum of its proper divisors (110628257983).

18415563538241 is a wasteful number, since it uses less digits than its factorization.

18415563538241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35920.

The product of its digits is 13824000, while the sum is 56.

The spelling of 18415563538241 in words is "eighteen trillion, four hundred fifteen billion, five hundred sixty-three million, five hundred thirty-eight thousand, two hundred forty-one".