645114013 has 4 divisors (see below), whose sum is σ = 645307648. Its totient is φ = 644920380.

The previous prime is 645114007. The next prime is 645114017. The reversal of 645114013 is 310411546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 645114013 - 2¹³ = 645105821 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 (645114017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91731 + ... + 98512.

It is an arithmetic number, because the mean of its divisors is an integer number (161326912).

Almost surely, 2^645114013 is an apocalyptic number.

It is an amenable number.

645114013 is a deficient number, since it is larger than the sum of its proper divisors (193635).

645114013 is a wasteful number, since it uses less digits than its factorization.

645114013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193634.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 645114013 is about 25399.0947279623. The cubic root of 645114013 is about 864.0631656244.

Adding to 645114013 its reverse (310411546), we get a palindrome (955525559).

The spelling of 645114013 in words is "six hundred forty-five million, one hundred fourteen thousand, thirteen".