11566429165640 has 32 divisors (see below), whose sum is σ = 26046390300480. Its totient is φ = 4622673945792.

The previous prime is 11566429165637. The next prime is 11566429165699. The reversal of 11566429165640 is 4656192466511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121755692 + ... + 121850651.

It is an arithmetic number, because the mean of its divisors is an integer number (813949696890).

Almost surely, 2^{11566429165640} is an apocalyptic number.

11566429165640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11566429165640 is an abundant number, since it is smaller than the sum of its proper divisors (14479961134840).

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

11566429165640 is a wasteful number, since it uses less digits than its factorization.

11566429165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243607541 (or 243607537 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 11566429165640 in words is "eleven trillion, five hundred sixty-six billion, four hundred twenty-nine million, one hundred sixty-five thousand, six hundred forty".