655445945 has 32 divisors (see below), whose sum is σ = 1032238080. Its totient is φ = 387080640.

The previous prime is 655445909. The next prime is 655445953. The reversal of 655445945 is 549544556.

It is a de Polignac number, because none of the positive numbers 2^k-655445945 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655445945.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37487 + ... + 52116.

It is an arithmetic number, because the mean of its divisors is an integer number (32257440).

Almost surely, 2^655445945 is an apocalyptic number.

It is an amenable number.

655445945 is a deficient number, since it is larger than the sum of its proper divisors (376792135).

655445945 is a wasteful number, since it uses less digits than its factorization.

655445945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89645.

The product of its digits is 2160000, while the sum is 47.

The square root of 655445945 is about 25601.6785582508. The cubic root of 655445945 is about 868.6516061295.

The spelling of 655445945 in words is "six hundred fifty-five million, four hundred forty-five thousand, nine hundred forty-five".