645582425753 has 32 divisors (see below), whose sum is σ = 731053071360. Its totient is φ = 567016934400.

The previous prime is 645582425713. The next prime is 645582425759. The reversal of 645582425753 is 357524285546.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645582425753 is a prime.

It is a super-2 number, since 2×645582425753² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645582425759) 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, 2637200 + ... + 2871582.

It is an arithmetic number, because the mean of its divisors is an integer number (22845408480).

Almost surely, 2^645582425753 is an apocalyptic number.

It is an amenable number.

645582425753 is a deficient number, since it is larger than the sum of its proper divisors (85470645607).

645582425753 is a wasteful number, since it uses less digits than its factorization.

645582425753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234617.

The product of its digits is 40320000, while the sum is 56.

The spelling of 645582425753 in words is "six hundred forty-five billion, five hundred eighty-two million, four hundred twenty-five thousand, seven hundred fifty-three".