645170414689 has 8 divisors (see below), whose sum is σ = 646354923552. Its totient is φ = 643986043680.

The previous prime is 645170414657. The next prime is 645170414701. The reversal of 645170414689 is 986414071546.

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 645170414689 - 2⁵ = 645170414657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645170415689) 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, 16556949 + ... + 16595869.

It is an arithmetic number, because the mean of its divisors is an integer number (80794365444).

Almost surely, 2^645170414689 is an apocalyptic number.

It is an amenable number.

645170414689 is a deficient number, since it is larger than the sum of its proper divisors (1184508863).

645170414689 is a wasteful number, since it uses less digits than its factorization.

645170414689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68927.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 645170414689 in words is "six hundred forty-five billion, one hundred seventy million, four hundred fourteen thousand, six hundred eighty-nine".