11156600115661 has 48 divisors (see below), whose sum is σ = 15111640454400. Its totient is φ = 8014801639680.

The previous prime is 11156600115599. The next prime is 11156600115691. The reversal of 11156600115661 is 16651100665111.

It is not a de Polignac number, because 11156600115661 - 2⁷ = 11156600115533 is a prime.

It is a super-2 number, since 2×11156600115661² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156600115691) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 8281680 + ... + 9534118.

It is an arithmetic number, because the mean of its divisors is an integer number (314825842800).

Almost surely, 2^{11156600115661} is an apocalyptic number.

11156600115661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11156600115661 is a deficient number, since it is larger than the sum of its proper divisors (3955040338739).

11156600115661 is a wasteful number, since it uses less digits than its factorization.

11156600115661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253290 (or 1253279 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 11156600115661 in words is "eleven trillion, one hundred fifty-six billion, six hundred million, one hundred fifteen thousand, six hundred sixty-one".