11665056515 has 32 divisors (see below), whose sum is σ = 16948600704. Its totient is φ = 7524034560.

The previous prime is 11665056499. The next prime is 11665056521. The reversal of 11665056515 is 51565056611.

It is not a de Polignac number, because 11665056515 - 2⁴ = 11665056499 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1269317 + ... + 1278473.

It is an arithmetic number, because the mean of its divisors is an integer number (529643772).

Almost surely, 2^11665056515 is an apocalyptic number.

11665056515 is a deficient number, since it is larger than the sum of its proper divisors (5283544189).

11665056515 is a wasteful number, since it uses less digits than its factorization.

11665056515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11327.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 11665056515 in words is "eleven billion, six hundred sixty-five million, fifty-six thousand, five hundred fifteen".