656745624645 has 32 divisors (see below), whose sum is σ = 1160830033920. Its totient is φ = 314391455040.

The previous prime is 656745624643. The next prime is 656745624659. The reversal of 656745624645 is 546426547656.

It is a happy number.

It is not a de Polignac number, because 656745624645 - 2¹ = 656745624643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656745624643) 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 31 ways as a sum of consecutive naturals, for example, 25178589 + ... + 25204658.

It is an arithmetic number, because the mean of its divisors is an integer number (36275938560).

Almost surely, 2^656745624645 is an apocalyptic number.

It is an amenable number.

656745624645 is a deficient number, since it is larger than the sum of its proper divisors (504084409275).

656745624645 is a wasteful number, since it uses less digits than its factorization.

656745624645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50383345.

The product of its digits is 145152000, while the sum is 60.

The spelling of 656745624645 in words is "six hundred fifty-six billion, seven hundred forty-five million, six hundred twenty-four thousand, six hundred forty-five".