645954695459 has 8 divisors (see below), whose sum is σ = 684021287808. Its totient is φ = 607895798400.

The previous prime is 645954695453. The next prime is 645954695501. The reversal of 645954695459 is 954596459546.

645954695459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645954695459 - 2⁴ = 645954695443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645954695392 and 645954695401.

It is not an unprimeable number, because it can be changed into a prime (645954695453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1750547 + ... + 2087180.

It is an arithmetic number, because the mean of its divisors is an integer number (85502660976).

Almost surely, 2^645954695459 is an apocalyptic number.

645954695459 is a deficient number, since it is larger than the sum of its proper divisors (38066592349).

645954695459 is a wasteful number, since it uses less digits than its factorization.

645954695459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847645.

The product of its digits is 1049760000, while the sum is 71.

The spelling of 645954695459 in words is "six hundred forty-five billion, nine hundred fifty-four million, six hundred ninety-five thousand, four hundred fifty-nine".