406563783493 has 24 divisors (see below), whose sum is σ = 467813441088. Its totient is φ = 346122012672.

The previous prime is 406563783449. The next prime is 406563783559. The reversal of 406563783493 is 394387365604.

It is not a de Polignac number, because 406563783493 - 2²¹ = 406561686341 is a prime.

It is a super-2 number, since 2×406563783493² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406563783433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311065746 + ... + 311067052.

It is an arithmetic number, because the mean of its divisors is an integer number (19492226712).

Almost surely, 2^406563783493 is an apocalyptic number.

It is an amenable number.

406563783493 is a deficient number, since it is larger than the sum of its proper divisors (61249657595).

406563783493 is a wasteful number, since it uses less digits than its factorization.

406563783493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 58.

The spelling of 406563783493 in words is "four hundred six billion, five hundred sixty-three million, seven hundred eighty-three thousand, four hundred ninety-three".