645605414 has 8 divisors (see below), whose sum is σ = 982047888. Its totient is φ = 318256120.

The previous prime is 645605371. The next prime is 645605431. The reversal of 645605414 is 414506546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×645605414² = 833612701172222792, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273117 + ... + 2273400.

It is an arithmetic number, because the mean of its divisors is an integer number (122755986).

Almost surely, 2^645605414 is an apocalyptic number.

645605414 is a deficient number, since it is larger than the sum of its proper divisors (336442474).

645605414 is a wasteful number, since it uses less digits than its factorization.

645605414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546590.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 645605414 is about 25408.7664793079. The cubic root of 645605414 is about 864.2825034627.

The spelling of 645605414 in words is "six hundred forty-five million, six hundred five thousand, four hundred fourteen".