645563354 has 8 divisors (see below), whose sum is σ = 974758368. Its totient is φ = 320643900.

The previous prime is 645563353. The next prime is 645563381. The reversal of 645563354 is 453365546.

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

It is not an unprimeable number, because it can be changed into a prime (645563351) 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, 1068512 + ... + 1069115.

It is an arithmetic number, because the mean of its divisors is an integer number (121844796).

Almost surely, 2^645563354 is an apocalyptic number.

645563354 is a deficient number, since it is larger than the sum of its proper divisors (329195014).

645563354 is a wasteful number, since it uses less digits than its factorization.

645563354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137780.

The product of its digits is 648000, while the sum is 41.

The square root of 645563354 is about 25407.9387987298. The cubic root of 645563354 is about 864.2637342523.

The spelling of 645563354 in words is "six hundred forty-five million, five hundred sixty-three thousand, three hundred fifty-four".