11615011523 has 4 divisors (see below), whose sum is σ = 12120012048. Its totient is φ = 11110011000.

The previous prime is 11615011511. The next prime is 11615011537. The reversal of 11615011523 is 32511051611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32511051611 = 83 ⋅391699417.

It is a cyclic number.

It is not a de Polignac number, because 11615011523 - 2⁸ = 11615011267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11615011492 and 11615011501.

It is not an unprimeable number, because it can be changed into a prime (11615010523) 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, 252500228 + ... + 252500273.

It is an arithmetic number, because the mean of its divisors is an integer number (3030003012).

Almost surely, 2^11615011523 is an apocalyptic number.

11615011523 is a deficient number, since it is larger than the sum of its proper divisors (505000525).

11615011523 is an equidigital number, since it uses as much as digits as its factorization.

11615011523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505000524.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 11615011523 in words is "eleven billion, six hundred fifteen million, eleven thousand, five hundred twenty-three".