11661764208625 has 16 divisors (see below), whose sum is σ = 14573469845376. Its totient is φ = 9316854884400.

The previous prime is 11661764208593. The next prime is 11661764208641. The reversal of 11661764208625 is 52680246716611.

It is not a de Polignac number, because 11661764208625 - 2⁵ = 11661764208593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62689167 + ... + 62874916.

It is an arithmetic number, because the mean of its divisors is an integer number (910841865336).

Almost surely, 2^{11661764208625} is an apocalyptic number.

It is an amenable number.

11661764208625 is a deficient number, since it is larger than the sum of its proper divisors (2911705636751).

11661764208625 is an equidigital number, since it uses as much as digits as its factorization.

11661764208625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125564841 (or 125564831 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 11661764208625 in words is "eleven trillion, six hundred sixty-one billion, seven hundred sixty-four million, two hundred eight thousand, six hundred twenty-five".