645415002109 has 8 divisors (see below), whose sum is σ = 646040888000. Its totient is φ = 644789214432.

The previous prime is 645415002101. The next prime is 645415002187. The reversal of 645415002109 is 901200514546.

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 645415002109 - 2³ = 645415002101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645415002101) 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, 24869062 + ... + 24895000.

It is an arithmetic number, because the mean of its divisors is an integer number (80755111000).

Almost surely, 2^645415002109 is an apocalyptic number.

It is an amenable number.

645415002109 is a deficient number, since it is larger than the sum of its proper divisors (625885891).

645415002109 is a wasteful number, since it uses less digits than its factorization.

645415002109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49107.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 645415002109 in words is "six hundred forty-five billion, four hundred fifteen million, two thousand, one hundred nine".