645170413 has 8 divisors (see below), whose sum is σ = 647535168. Its totient is φ = 642811104.

The previous prime is 645170399. The next prime is 645170467. The reversal of 645170413 is 314071546.

645170413 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 645170413 - 2²⁵ = 611615981 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 (645170483) 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, 526920 + ... + 528142.

It is an arithmetic number, because the mean of its divisors is an integer number (80941896).

Almost surely, 2^645170413 is an apocalyptic number.

It is an amenable number.

645170413 is a deficient number, since it is larger than the sum of its proper divisors (2364755).

645170413 is a wasteful number, since it uses less digits than its factorization.

645170413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 645170413 is about 25400.2049794879. The cubic root of 645170413 is about 864.0883455365.

The spelling of 645170413 in words is "six hundred forty-five million, one hundred seventy thousand, four hundred thirteen".