11637145123 has 4 divisors (see below), whose sum is σ = 11637889648. Its totient is φ = 11636400600.

The previous prime is 11637145109. The next prime is 11637145127. The reversal of 11637145123 is 32154173611.

11637145123 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 an emirpimes, since its reverse is a distinct semiprime: 32154173611 = 7 ⋅4593453373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11637145123 is a prime.

It is a super-2 number, since 2×11637145123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11637145127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348303 + ... + 380248.

It is an arithmetic number, because the mean of its divisors is an integer number (2909472412).

Almost surely, 2^11637145123 is an apocalyptic number.

11637145123 is a deficient number, since it is larger than the sum of its proper divisors (744525).

11637145123 is an equidigital number, since it uses as much as digits as its factorization.

11637145123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744524.

The product of its digits is 15120, while the sum is 34.

The spelling of 11637145123 in words is "eleven billion, six hundred thirty-seven million, one hundred forty-five thousand, one hundred twenty-three".