10661156156 has 12 divisors (see below), whose sum is σ = 21322312368. Its totient is φ = 4569066912.

The previous prime is 10661156141. The next prime is 10661156179. The reversal of 10661156156 is 65165116601.

10661156156 is an admirable number.

It is a super-2 number, since 2×10661156156² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 190377761 + ... + 190377816.

It is an arithmetic number, because the mean of its divisors is an integer number (1776859364).

Almost surely, 2^10661156156 is an apocalyptic number.

It is an amenable number.

10661156156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10661156156 is a wasteful number, since it uses less digits than its factorization.

10661156156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380755588 (or 380755586 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 10661156156 in words is "ten billion, six hundred sixty-one million, one hundred fifty-six thousand, one hundred fifty-six".