11665161525 has 12 divisors (see below), whose sum is σ = 19286400512. Its totient is φ = 6221419440.

The previous prime is 11665161517. The next prime is 11665161527. The reversal of 11665161525 is 52516156611.

It is not a de Polignac number, because 11665161525 - 2³ = 11665161517 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 (11665161527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77767669 + ... + 77767818.

Almost surely, 2^11665161525 is an apocalyptic number.

11665161525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11665161525 is a deficient number, since it is larger than the sum of its proper divisors (7621238987).

11665161525 is a wasteful number, since it uses less digits than its factorization.

11665161525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155535500 (or 155535495 counting only the distinct ones).

The product of its digits is 54000, while the sum is 39.

The spelling of 11665161525 in words is "eleven billion, six hundred sixty-five million, one hundred sixty-one thousand, five hundred twenty-five".