645011045 has 8 divisors (see below), whose sum is σ = 884586624. Its totient is φ = 442293264.

The previous prime is 645011041. The next prime is 645011083. The reversal of 645011045 is 540110546.

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

It is not a de Polignac number, because 645011045 - 2² = 645011041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645011041) 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, 9214409 + ... + 9214478.

It is an arithmetic number, because the mean of its divisors is an integer number (110573328).

Almost surely, 2^645011045 is an apocalyptic number.

It is an amenable number.

645011045 is a deficient number, since it is larger than the sum of its proper divisors (239575579).

645011045 is a wasteful number, since it uses less digits than its factorization.

645011045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428899.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 645011045 is about 25397.0676456948. The cubic root of 645011045 is about 864.0171915339.

The spelling of 645011045 in words is "six hundred forty-five million, eleven thousand, forty-five".