645111147 has 32 divisors (see below), whose sum is σ = 907038720. Its totient is φ = 407324160.

The previous prime is 645111127. The next prime is 645111151. The reversal of 645111147 is 741111546.

It is not a de Polignac number, because 645111147 - 2⁶ = 645111083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645111127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1133479 + ... + 1134047.

It is an arithmetic number, because the mean of its divisors is an integer number (28344960).

Almost surely, 2^645111147 is an apocalyptic number.

645111147 is a deficient number, since it is larger than the sum of its proper divisors (261927573).

645111147 is a wasteful number, since it uses less digits than its factorization.

645111147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843.

The product of its digits is 3360, while the sum is 30.

The square root of 645111147 is about 25399.0383085659. The cubic root of 645111147 is about 864.0618860528.

The spelling of 645111147 in words is "six hundred forty-five million, one hundred eleven thousand, one hundred forty-seven".