645570046395 has 24 divisors (see below), whose sum is σ = 1119681937296. Its totient is φ = 344090530368.

The previous prime is 645570046327. The next prime is 645570046487. The reversal of 645570046395 is 593640075546.

645570046395 is a `hidden beast` number, since 6 + 4 + 5 + 570 + 0 + 4 + 63 + 9 + 5 = 666.

It is not a de Polignac number, because 645570046395 - 2⁸ = 645570046139 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 4374409 + ... + 4519578.

It is an arithmetic number, because the mean of its divisors is an integer number (46653414054).

Almost surely, 2^645570046395 is an apocalyptic number.

645570046395 is a deficient number, since it is larger than the sum of its proper divisors (474111890901).

645570046395 is a wasteful number, since it uses less digits than its factorization.

645570046395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8895611 (or 8895608 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 645570046395 in words is "six hundred forty-five billion, five hundred seventy million, forty-six thousand, three hundred ninety-five".