1645240612 has 12 divisors (see below), whose sum is σ = 2891856240. Its totient is φ = 818995976.

The previous prime is 1645240607. The next prime is 1645240621. The reversal of 1645240612 is 2160425461.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905062 + ... + 906877.

It is an arithmetic number, because the mean of its divisors is an integer number (240988020).

Almost surely, 2^1645240612 is an apocalyptic number.

It is an amenable number.

1645240612 is a deficient number, since it is larger than the sum of its proper divisors (1246615628).

1645240612 is a wasteful number, since it uses less digits than its factorization.

1645240612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812170 (or 1812168 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1645240612 is about 40561.5656995634. The cubic root of 1645240612 is about 1180.5284935151.

The spelling of 1645240612 in words is "one billion, six hundred forty-five million, two hundred forty thousand, six hundred twelve".