11615666140 has 48 divisors (see below), whose sum is σ = 26301451680. Its totient is φ = 4283608320.

The previous prime is 11615666099. The next prime is 11615666219. The reversal of 11615666140 is 4166651611.

It is a self number, because there is not a number n which added to its sum of digits gives 11615666140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188595 + ... + 242485.

It is an arithmetic number, because the mean of its divisors is an integer number (547946910).

Almost surely, 2^11615666140 is an apocalyptic number.

11615666140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11615666140 is an abundant number, since it is smaller than the sum of its proper divisors (14685785540).

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

11615666140 is a wasteful number, since it uses less digits than its factorization.

11615666140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54742 (or 54740 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 11615666140 in words is "eleven billion, six hundred fifteen million, six hundred sixty-six thousand, one hundred forty".