645128110062 has 32 divisors (see below), whose sum is σ = 1441538585760. Its totient is φ = 213854618880.

The previous prime is 645128110057. The next prime is 645128110093. The reversal of 645128110062 is 260011821546.

It is a happy number.

645128110062 is a `hidden beast` number, since 6 + 4 + 512 + 81 + 1 + 0 + 0 + 62 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 645128109999 and 645128110026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32992483 + ... + 33012030.

It is an arithmetic number, because the mean of its divisors is an integer number (45048080805).

Almost surely, 2^645128110062 is an apocalyptic number.

645128110062 is an abundant number, since it is smaller than the sum of its proper divisors (796410475698).

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

645128110062 is a wasteful number, since it uses less digits than its factorization.

645128110062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66004705 (or 66004699 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 645128110062 in words is "six hundred forty-five billion, one hundred twenty-eight million, one hundred ten thousand, sixty-two".