10661169143 has 4 divisors (see below), whose sum is σ = 10789617048. Its totient is φ = 10532721240.

The previous prime is 10661169137. The next prime is 10661169157. The reversal of 10661169143 is 34196116601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10661169143 - 2¹⁸ = 10660906999 is a prime.

It is a super-2 number, since 2×10661169143² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10661169097 and 10661169106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661169163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64223828 + ... + 64223993.

It is an arithmetic number, because the mean of its divisors is an integer number (2697404262).

Almost surely, 2^10661169143 is an apocalyptic number.

10661169143 is a deficient number, since it is larger than the sum of its proper divisors (128447905).

10661169143 is an equidigital number, since it uses as much as digits as its factorization.

10661169143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128447904.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 10661169143 in words is "ten billion, six hundred sixty-one million, one hundred sixty-nine thousand, one hundred forty-three".