655643446 has 16 divisors (see below), whose sum is σ = 1007599824. Its totient is φ = 319796064.

The previous prime is 655643413. The next prime is 655643447. The reversal of 655643446 is 644346556.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655643447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71076 + ... + 79768.

It is an arithmetic number, because the mean of its divisors is an integer number (62974989).

Almost surely, 2^655643446 is an apocalyptic number.

655643446 is a deficient number, since it is larger than the sum of its proper divisors (351956378).

655643446 is a wasteful number, since it uses less digits than its factorization.

655643446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9615.

The product of its digits is 1036800, while the sum is 43.

The square root of 655643446 is about 25605.5354562251. The cubic root of 655643446 is about 868.7388456308.

The spelling of 655643446 in words is "six hundred fifty-five million, six hundred forty-three thousand, four hundred forty-six".