493665566394 has 576 divisors, whose sum is σ = 1426151688192. Its totient is φ = 111226452480.

The previous prime is 493665566377. The next prime is 493665566423.

493665566394 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1323499992 + ... + 1323500364.

It is an arithmetic number, because the mean of its divisors is an integer number (2475957792).

Almost surely, 2^493665566394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 493665566394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713075844096).

493665566394 is an abundant number, since it is smaller than the sum of its proper divisors (932486121798).

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

493665566394 is a wasteful number, since it uses less digits than its factorization.

493665566394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 499 counting only the distinct ones).

The product of its digits is 377913600, while the sum is 66.

The spelling of 493665566394 in words is "four hundred ninety-three billion, six hundred sixty-five million, five hundred sixty-six thousand, three hundred ninety-four".