11661516143 has 8 divisors (see below), whose sum is σ = 12465333216. Its totient is φ = 10882432000.

The previous prime is 11661516131. The next prime is 11661516151. The reversal of 11661516143 is 34161516611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11661516143 - 2⁴ = 11661516127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661516173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6182258 + ... + 6184143.

It is an arithmetic number, because the mean of its divisors is an integer number (1558166652).

Almost surely, 2^11661516143 is an apocalyptic number.

11661516143 is a deficient number, since it is larger than the sum of its proper divisors (803817073).

11661516143 is a wasteful number, since it uses less digits than its factorization.

11661516143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12366465.

The product of its digits is 12960, while the sum is 35.

The spelling of 11661516143 in words is "eleven billion, six hundred sixty-one million, five hundred sixteen thousand, one hundred forty-three".