645047340472 has 32 divisors (see below), whose sum is σ = 1220268448800. Its totient is φ = 319642896384.

The previous prime is 645047340467. The next prime is 645047340479. The reversal of 645047340472 is 274043740546.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645047340479) 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, 15128848 + ... + 15171424.

It is an arithmetic number, because the mean of its divisors is an integer number (38133389025).

Almost surely, 2^645047340472 is an apocalyptic number.

It is an amenable number.

645047340472 is a deficient number, since it is larger than the sum of its proper divisors (575221108328).

645047340472 is a wasteful number, since it uses less digits than its factorization.

645047340472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59455 (or 59451 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 46.

The spelling of 645047340472 in words is "six hundred forty-five billion, forty-seven million, three hundred forty thousand, four hundred seventy-two".