642523496 has 16 divisors (see below), whose sum is σ = 1208536740. Its totient is φ = 320247040.

The previous prime is 642523493. The next prime is 642523523. The reversal of 642523496 is 694325246.

It can be written as a sum of positive squares in 2 ways, for example, as 534072100 + 108451396 = 23110^2 + 10414^2 .

It is not an unprimeable number, because it can be changed into a prime (642523493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124145 + ... + 129216.

Almost surely, 2^642523496 is an apocalyptic number.

It is an amenable number.

642523496 is a deficient number, since it is larger than the sum of its proper divisors (566013244).

642523496 is a wasteful number, since it uses less digits than its factorization.

642523496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253684 (or 253680 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 642523496 is about 25348.0471831658. The cubic root of 642523496 is about 862.9050379620.

The spelling of 642523496 in words is "six hundred forty-two million, five hundred twenty-three thousand, four hundred ninety-six".