645789411 has 12 divisors (see below), whose sum is σ = 933718240. Its totient is φ = 430105680.

The previous prime is 645789383. The next prime is 645789433. The reversal of 645789411 is 114987546.

645789411 is a `hidden beast` number, since 64 + 578 + 9 + 4 + 11 = 666.

It is not a de Polignac number, because 645789411 - 2⁷ = 645789283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645789481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25180 + ... + 43881.

Almost surely, 2^645789411 is an apocalyptic number.

645789411 is a deficient number, since it is larger than the sum of its proper divisors (287928829).

645789411 is a wasteful number, since it uses less digits than its factorization.

645789411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70106 (or 70103 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 645789411 is about 25412.3869599060. The cubic root of 645789411 is about 864.3646022593.

The spelling of 645789411 in words is "six hundred forty-five million, seven hundred eighty-nine thousand, four hundred eleven".