645006495495 has 32 divisors (see below), whose sum is σ = 1065382539264. Its totient is φ = 332881113600.

The previous prime is 645006495467. The next prime is 645006495499. The reversal of 645006495495 is 594594600546.

It is a de Polignac number, because none of the positive numbers 2^k-645006495495 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645006495499) 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, 7055599 + ... + 7146431.

It is an arithmetic number, because the mean of its divisors is an integer number (33293204352).

Almost surely, 2^645006495495 is an apocalyptic number.

645006495495 is a deficient number, since it is larger than the sum of its proper divisors (420376043769).

645006495495 is a wasteful number, since it uses less digits than its factorization.

645006495495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106143.

The product of its (nonzero) digits is 23328000, while the sum is 57.

The spelling of 645006495495 in words is "six hundred forty-five billion, six million, four hundred ninety-five thousand, four hundred ninety-five".