18120041265 has 16 divisors (see below), whose sum is σ = 29775636288. Its totient is φ = 9402831936.

The previous prime is 18120041231. The next prime is 18120041267. The reversal of 18120041265 is 56214002181.

It is not a de Polignac number, because 18120041265 - 2¹⁸ = 18119779121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18120041267) 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, 16323807 + ... + 16324916.

It is an arithmetic number, because the mean of its divisors is an integer number (1860977268).

Almost surely, 2^18120041265 is an apocalyptic number.

18120041265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18120041265 is a deficient number, since it is larger than the sum of its proper divisors (11655595023).

18120041265 is a wasteful number, since it uses less digits than its factorization.

18120041265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32648768.

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 18120041265 in words is "eighteen billion, one hundred twenty million, forty-one thousand, two hundred sixty-five".