645270206510 has 64 divisors (see below), whose sum is σ = 1243327905792. Its totient is φ = 240548643456.

The previous prime is 645270206461. The next prime is 645270206519. The reversal of 645270206510 is 15602072546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645270206519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2276792 + ... + 2544468.

It is an arithmetic number, because the mean of its divisors is an integer number (19426998528).

Almost surely, 2^645270206510 is an apocalyptic number.

645270206510 is a deficient number, since it is larger than the sum of its proper divisors (598057699282).

645270206510 is a wasteful number, since it uses less digits than its factorization.

645270206510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267977.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 645270206510 in words is "six hundred forty-five billion, two hundred seventy million, two hundred six thousand, five hundred ten".