645600005622 has 48 divisors (see below), whose sum is σ = 1643345475408. Its totient is φ = 180587413440.

The previous prime is 645600005621. The next prime is 645600005681. The reversal of 645600005622 is 226500006546.

645600005622 is a `hidden beast` number, since 6 + 45 + 600 + 0 + 0 + 5 + 6 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645600005621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125405353 + ... + 125410500.

It is an arithmetic number, because the mean of its divisors is an integer number (34236364071).

Almost surely, 2^645600005622 is an apocalyptic number.

645600005622 is an abundant number, since it is smaller than the sum of its proper divisors (997745469786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645600005622 is a wasteful number, since it uses less digits than its factorization.

645600005622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250815885 (or 250815882 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 645600005622 in words is "six hundred forty-five billion, six hundred million, five thousand, six hundred twenty-two".