11514613521 has 4 divisors (see below), whose sum is σ = 15352818032. Its totient is φ = 7676409012.

The previous prime is 11514613507. The next prime is 11514613543. The reversal of 11514613521 is 12531641511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11514613521 - 2⁶ = 11514613457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11514614521) 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, 1919102251 + ... + 1919102256.

It is an arithmetic number, because the mean of its divisors is an integer number (3838204508).

Almost surely, 2^11514613521 is an apocalyptic number.

It is an amenable number.

11514613521 is a deficient number, since it is larger than the sum of its proper divisors (3838204511).

11514613521 is an equidigital number, since it uses as much as digits as its factorization.

11514613521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838204510.

The product of its digits is 3600, while the sum is 30.

The spelling of 11514613521 in words is "eleven billion, five hundred fourteen million, six hundred thirteen thousand, five hundred twenty-one".