45120123511 has 4 divisors (see below), whose sum is σ = 45346858000. Its totient is φ = 44893389024.

The previous prime is 45120123509. The next prime is 45120123527. The reversal of 45120123511 is 11532102154.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45120123511 - 2¹ = 45120123509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45120123311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113366946 + ... + 113367343.

It is an arithmetic number, because the mean of its divisors is an integer number (11336714500).

Almost surely, 2^45120123511 is an apocalyptic number.

45120123511 is a deficient number, since it is larger than the sum of its proper divisors (226734489).

45120123511 is a wasteful number, since it uses less digits than its factorization.

45120123511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226734488.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 45120123511 its reverse (11532102154), we get a palindrome (56652225665).

The spelling of 45120123511 in words is "forty-five billion, one hundred twenty million, one hundred twenty-three thousand, five hundred eleven".