645887041213315 has 48 divisors (see below), whose sum is σ = 856242910353600. Its totient is φ = 467358348441600.

The previous prime is 645887041213303. The next prime is 645887041213331. The reversal of 645887041213315 is 513312140788546.

It is a happy number.

It is not a de Polignac number, because 645887041213315 - 2¹³ = 645887041205123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645887041213315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3917209675 + ... + 3917374555.

It is an arithmetic number, because the mean of its divisors is an integer number (17838393965700).

Almost surely, 2^{645887041213315} is an apocalyptic number.

645887041213315 is a deficient number, since it is larger than the sum of its proper divisors (210355869140285).

645887041213315 is a wasteful number, since it uses less digits than its factorization.

645887041213315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197644 (or 197633 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 645887041213315 in words is "six hundred forty-five trillion, eight hundred eighty-seven billion, forty-one million, two hundred thirteen thousand, three hundred fifteen".