11515650667 has 4 divisors (see below), whose sum is σ = 11515866856. Its totient is φ = 11515434480.

The previous prime is 11515650617. The next prime is 11515650683. The reversal of 11515650667 is 76605651511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76605651511 = 67 ⋅1143367933.

It is a cyclic number.

It is not a de Polignac number, because 11515650667 - 2¹⁹ = 11515126379 is a prime.

It is a super-2 number, since 2×11515650667² (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 (11515650617) 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, 34567 + ... + 155647.

It is an arithmetic number, because the mean of its divisors is an integer number (2878966714).

Almost surely, 2^11515650667 is an apocalyptic number.

11515650667 is a deficient number, since it is larger than the sum of its proper divisors (216189).

11515650667 is an equidigital number, since it uses as much as digits as its factorization.

11515650667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216188.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 11515650667 in words is "eleven billion, five hundred fifteen million, six hundred fifty thousand, six hundred sixty-seven".