645935609007 has 24 divisors (see below), whose sum is σ = 1028155912784. Its totient is φ = 388254674304.

The previous prime is 645935608993. The next prime is 645935609041. The reversal of 645935609007 is 700906539546.

645935609007 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645935609007 - 2⁴ = 645935608991 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645935609087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64190518 + ... + 64200579.

Almost surely, 2^645935609007 is an apocalyptic number.

645935609007 is a deficient number, since it is larger than the sum of its proper divisors (382220303777).

645935609007 is a wasteful number, since it uses less digits than its factorization.

645935609007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128391159 (or 128391156 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 54.

The spelling of 645935609007 in words is "six hundred forty-five billion, nine hundred thirty-five million, six hundred nine thousand, seven".