645624525634 has 32 divisors (see below), whose sum is σ = 1066872508416. Its totient is φ = 290578656720.

The previous prime is 645624525589. The next prime is 645624525643. The reversal of 645624525634 is 436525426546.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24566169 + ... + 24592435.

It is an arithmetic number, because the mean of its divisors is an integer number (33339765888).

Almost surely, 2^645624525634 is an apocalyptic number.

645624525634 is a deficient number, since it is larger than the sum of its proper divisors (421247982782).

645624525634 is a wasteful number, since it uses less digits than its factorization.

645624525634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37230.

The product of its digits is 20736000, while the sum is 52.

The spelling of 645624525634 in words is "six hundred forty-five billion, six hundred twenty-four million, five hundred twenty-five thousand, six hundred thirty-four".