645514327 has 4 divisors (see below), whose sum is σ = 683485776. Its totient is φ = 607542880.

The previous prime is 645514313. The next prime is 645514351. The reversal of 645514327 is 723415546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645514327 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 (645514307) 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, 18985699 + ... + 18985732.

It is an arithmetic number, because the mean of its divisors is an integer number (170871444).

Almost surely, 2^645514327 is an apocalyptic number.

645514327 is a deficient number, since it is larger than the sum of its proper divisors (37971449).

645514327 is a wasteful number, since it uses less digits than its factorization.

645514327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37971448.

The product of its digits is 100800, while the sum is 37.

The square root of 645514327 is about 25406.9739835345. The cubic root of 645514327 is about 864.2418549998.

The spelling of 645514327 in words is "six hundred forty-five million, five hundred fourteen thousand, three hundred twenty-seven".