645161548 has 6 divisors (see below), whose sum is σ = 1129032716. Its totient is φ = 322580772.

The previous prime is 645161537. The next prime is 645161567. The reversal of 645161548 is 845161546.

It is a self number, because there is not a number n which added to its sum of digits gives 645161548.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80645190 + ... + 80645197.

Almost surely, 2^645161548 is an apocalyptic number.

It is an amenable number.

645161548 is a deficient number, since it is larger than the sum of its proper divisors (483871168).

645161548 is a wasteful number, since it uses less digits than its factorization.

645161548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161290391 (or 161290389 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 645161548 is about 25400.0304724227. The cubic root of 645161548 is about 864.0843878337.

The spelling of 645161548 in words is "six hundred forty-five million, one hundred sixty-one thousand, five hundred forty-eight".