11661165415 has 8 divisors (see below), whose sum is σ = 14202255600. Its totient is φ = 9189694272.

The previous prime is 11661165377. The next prime is 11661165433. The reversal of 11661165415 is 51456116611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11661165415 - 2⁷ = 11661165287 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17404390 + ... + 17405059.

It is an arithmetic number, because the mean of its divisors is an integer number (1775281950).

Almost surely, 2^11661165415 is an apocalyptic number.

11661165415 is a deficient number, since it is larger than the sum of its proper divisors (2541090185).

11661165415 is an equidigital number, since it uses as much as digits as its factorization.

11661165415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34809521.

The product of its digits is 21600, while the sum is 37.

The spelling of 11661165415 in words is "eleven billion, six hundred sixty-one million, one hundred sixty-five thousand, four hundred fifteen".