9855660143 has 16 divisors (see below), whose sum is σ = 11339564544. Its totient is φ = 8390821920.

The previous prime is 9855660131. The next prime is 9855660161. The reversal of 9855660143 is 3410665589.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9855660143 - 2⁶ = 9855660079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855660173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2227073 + ... + 2231493.

It is an arithmetic number, because the mean of its divisors is an integer number (708722784).

Almost surely, 2^9855660143 is an apocalyptic number.

9855660143 is a deficient number, since it is larger than the sum of its proper divisors (1483904401).

9855660143 is a wasteful number, since it uses less digits than its factorization.

9855660143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6502.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 9855660143 is about 99275.6774995769. The cubic root of 9855660143 is about 2144.0187202938.

The spelling of 9855660143 in words is "nine billion, eight hundred fifty-five million, six hundred sixty thousand, one hundred forty-three".