493964038661 has 16 divisors (see below), whose sum is σ = 506422692864. Its totient is φ = 481587731184.

The previous prime is 493964038627. The next prime is 493964038679. The reversal of 493964038661 is 166830469394.

It is a de Polignac number, because none of the positive numbers 2^k-493964038661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493964038661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493964038361) 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, 79629986 + ... + 79636188.

It is an arithmetic number, because the mean of its divisors is an integer number (31651418304).

Almost surely, 2^493964038661 is an apocalyptic number.

It is an amenable number.

493964038661 is a deficient number, since it is larger than the sum of its proper divisors (12458654203).

493964038661 is a wasteful number, since it uses less digits than its factorization.

493964038661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12520.

The product of its (nonzero) digits is 20155392, while the sum is 59.

The spelling of 493964038661 in words is "four hundred ninety-three billion, nine hundred sixty-four million, thirty-eight thousand, six hundred sixty-one".