645160747 has 24 divisors (see below), whose sum is σ = 836627456. Its totient is φ = 486486000.

The previous prime is 645160729. The next prime is 645160781. The reversal of 645160747 is 747061546.

It is not a de Polignac number, because 645160747 - 2²³ = 636772139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645160717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13972 + ... + 38542.

Almost surely, 2^645160747 is an apocalyptic number.

645160747 is a deficient number, since it is larger than the sum of its proper divisors (191466709).

645160747 is a wasteful number, since it uses less digits than its factorization.

645160747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24631 (or 24620 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 645160747 is about 25400.0147047202. The cubic root of 645160747 is about 864.0840302324.

The spelling of 645160747 in words is "six hundred forty-five million, one hundred sixty thousand, seven hundred forty-seven".