11511651013 has 4 divisors (see below), whose sum is σ = 11562363360. Its totient is φ = 11460938668.

The previous prime is 11511651001. The next prime is 11511651017. The reversal of 11511651013 is 31015611511.

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 a cyclic number.

It is not a de Polignac number, because 11511651013 - 2²⁹ = 10974780101 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 (11511651017) 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, 25355833 + ... + 25356286.

It is an arithmetic number, because the mean of its divisors is an integer number (2890590840).

Almost surely, 2^11511651013 is an apocalyptic number.

It is an amenable number.

11511651013 is a deficient number, since it is larger than the sum of its proper divisors (50712347).

11511651013 is an equidigital number, since it uses as much as digits as its factorization.

11511651013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50712346.

The product of its (nonzero) digits is 450, while the sum is 25.

The spelling of 11511651013 in words is "eleven billion, five hundred eleven million, six hundred fifty-one thousand, thirteen".