645670627 has 8 divisors (see below), whose sum is σ = 738218336. Its totient is φ = 553200192.

The previous prime is 645670601. The next prime is 645670633. The reversal of 645670627 is 726076546.

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 645670627 - 2¹⁵ = 645637859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645670637) 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, 138 + ... + 35935.

It is an arithmetic number, because the mean of its divisors is an integer number (92277292).

Almost surely, 2^645670627 is an apocalyptic number.

645670627 is a deficient number, since it is larger than the sum of its proper divisors (92547709).

645670627 is a wasteful number, since it uses less digits than its factorization.

645670627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38637.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 645670627 is about 25410.0497244693. The cubic root of 645670627 is about 864.3116030520.

The spelling of 645670627 in words is "six hundred forty-five million, six hundred seventy thousand, six hundred twenty-seven".