11661560611110 has 48 divisors (see below), whose sum is σ = 30392076826800. Its totient is φ = 3102362907840.

The previous prime is 11661560611087. The next prime is 11661560611111. The reversal of 11661560611110 is 1111606516611.

It is a happy number.

11661560611110 is a `hidden beast` number, since 1 + 16 + 6 + 1 + 560 + 61 + 11 + 10 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661560611111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153849160 + ... + 153924939.

It is an arithmetic number, because the mean of its divisors is an integer number (633168267225).

Almost surely, 2^{11661560611110} is an apocalyptic number.

11661560611110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11661560611110 is an abundant number, since it is smaller than the sum of its proper divisors (18730516215690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661560611110 is a wasteful number, since it uses less digits than its factorization.

11661560611110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307774533 (or 307774530 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 11661560611110 in words is "eleven trillion, six hundred sixty-one billion, five hundred sixty million, six hundred eleven thousand, one hundred ten".