11125136523 has 4 divisors (see below), whose sum is σ = 14833515368. Its totient is φ = 7416757680.

The previous prime is 11125136521. The next prime is 11125136543. The reversal of 11125136523 is 32563152111.

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

It is not a de Polignac number, because 11125136523 - 2¹ = 11125136521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11125136521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1854189418 + ... + 1854189423.

It is an arithmetic number, because the mean of its divisors is an integer number (3708378842).

Almost surely, 2^11125136523 is an apocalyptic number.

11125136523 is a deficient number, since it is larger than the sum of its proper divisors (3708378845).

11125136523 is an equidigital number, since it uses as much as digits as its factorization.

11125136523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708378844.

The product of its digits is 5400, while the sum is 30.

Adding to 11125136523 its reverse (32563152111), we get a palindrome (43688288634).

The spelling of 11125136523 in words is "eleven billion, one hundred twenty-five million, one hundred thirty-six thousand, five hundred twenty-three".