645252053 has 8 divisors (see below), whose sum is σ = 653391360. Its totient is φ = 637162720.

The previous prime is 645252031. The next prime is 645252107. The reversal of 645252053 is 350252546.

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 645252053 - 2⁸ = 645251797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645252253) 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 7 ways as a sum of consecutive naturals, for example, 13838 + ... + 38496.

It is an arithmetic number, because the mean of its divisors is an integer number (81673920).

Almost surely, 2^645252053 is an apocalyptic number.

It is an amenable number.

645252053 is a deficient number, since it is larger than the sum of its proper divisors (8139307).

645252053 is a wasteful number, since it uses less digits than its factorization.

645252053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24987.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 645252053 is about 25401.8120022962. The cubic root of 645252053 is about 864.1247913064.

The spelling of 645252053 in words is "six hundred forty-five million, two hundred fifty-two thousand, fifty-three".