643285595492 has 24 divisors (see below), whose sum is σ = 1129069891320. Its totient is φ = 320695441920.

The previous prime is 643285595483. The next prime is 643285595503. The reversal of 643285595492 is 294595582346.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 114139919716 + 529145675776 = 337846^2 + 727424^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1924028 + ... + 2233484.

It is an arithmetic number, because the mean of its divisors is an integer number (47044578805).

Almost surely, 2^643285595492 is an apocalyptic number.

It is an amenable number.

643285595492 is a deficient number, since it is larger than the sum of its proper divisors (485784295828).

643285595492 is a wasteful number, since it uses less digits than its factorization.

643285595492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310991 (or 310989 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 62.

The spelling of 643285595492 in words is "six hundred forty-three billion, two hundred eighty-five million, five hundred ninety-five thousand, four hundred ninety-two".