41518545121 has 3 divisors (see below), whose sum is σ = 41518748883. Its totient is φ = 41518341360.

The previous prime is 41518545011. The next prime is 41518545127. The reversal of 41518545121 is 12154581514.

The square root of 41518545121 is 203761.

It is a perfect power (a square), and thus also a powerful number.

41518545121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4700610721 + 36817934400 = 68561^2 + 191880^2 .

It is not a de Polignac number, because 41518545121 - 2¹⁹ = 41518020833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41518545127) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 101881 + ... + 305641.

It is an arithmetic number, because the mean of its divisors is an integer number (13839582961).

Almost surely, 2^41518545121 is an apocalyptic number.

41518545121 is the 203761-st square number.

41518545121 is the 101881-st centered octagonal number.

It is an amenable number.

41518545121 is a deficient number, since it is larger than the sum of its proper divisors (203762).

41518545121 is an frugal number, since it uses more digits than its factorization.

41518545121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407522 (or 203761 counting only the distinct ones).

The product of its digits is 32000, while the sum is 37.

The spelling of 41518545121 in words is "forty-one billion, five hundred eighteen million, five hundred forty-five thousand, one hundred twenty-one".