645610802095 has 24 divisors (see below), whose sum is σ = 901488317184. Its totient is φ = 442572734016.

The previous prime is 645610802069. The next prime is 645610802141. The reversal of 645610802095 is 590208016546.

It is a de Polignac number, because none of the positive numbers 2^k-645610802095 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 435762 + ... + 1217008.

It is an arithmetic number, because the mean of its divisors is an integer number (37562013216).

Almost surely, 2^645610802095 is an apocalyptic number.

645610802095 is a deficient number, since it is larger than the sum of its proper divisors (255877515089).

645610802095 is a wasteful number, since it uses less digits than its factorization.

645610802095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784639 (or 784632 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 645610802095 in words is "six hundred forty-five billion, six hundred ten million, eight hundred two thousand, ninety-five".