493642988871 has 4 divisors (see below), whose sum is σ = 658190651832. Its totient is φ = 329095325912.

The previous prime is 493642988843. The next prime is 493642988947. The reversal of 493642988871 is 178889246394.

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 493642988871 - 2¹⁰ = 493642987847 is a prime.

It is a super-2 number, since 2×493642988871² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 493642988796 and 493642988805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493642988071) 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, 82273831476 + ... + 82273831481.

It is an arithmetic number, because the mean of its divisors is an integer number (164547662958).

Almost surely, 2^493642988871 is an apocalyptic number.

493642988871 is a deficient number, since it is larger than the sum of its proper divisors (164547662961).

493642988871 is a wasteful number, since it uses less digits than its factorization.

493642988871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164547662960.

The product of its digits is 167215104, while the sum is 69.

The spelling of 493642988871 in words is "four hundred ninety-three billion, six hundred forty-two million, nine hundred eighty-eight thousand, eight hundred seventy-one".