647625231522 has 32 divisors (see below), whose sum is σ = 1458881808960. Its totient is φ = 212917883040.

The previous prime is 647625231509. The next prime is 647625231577. The reversal of 647625231522 is 225132526746.

647625231522 is a `hidden beast` number, since 6 + 4 + 7 + 625 + 2 + 3 + 15 + 2 + 2 = 666.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 82140304 + ... + 82148187.

It is an arithmetic number, because the mean of its divisors is an integer number (45590056530).

Almost surely, 2^647625231522 is an apocalyptic number.

647625231522 is an abundant number, since it is smaller than the sum of its proper divisors (811256577438).

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

647625231522 is a wasteful number, since it uses less digits than its factorization.

647625231522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164288575 (or 164288569 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The spelling of 647625231522 in words is "six hundred forty-seven billion, six hundred twenty-five million, two hundred thirty-one thousand, five hundred twenty-two".