647256318532 has 48 divisors (see below), whose sum is σ = 1224791346240. Its totient is φ = 298299359232.

The previous prime is 647256318523. The next prime is 647256318539. The reversal of 647256318532 is 235813652746.

647256318532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 647256318532.

It is not an unprimeable number, because it can be changed into a prime (647256318539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454548 + ... + 1225204.

It is an arithmetic number, because the mean of its divisors is an integer number (25516486380).

Almost surely, 2^647256318532 is an apocalyptic number.

It is an amenable number.

647256318532 is a deficient number, since it is larger than the sum of its proper divisors (577535027708).

647256318532 is a wasteful number, since it uses less digits than its factorization.

647256318532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770980 (or 770978 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 52.

The spelling of 647256318532 in words is "six hundred forty-seven billion, two hundred fifty-six million, three hundred eighteen thousand, five hundred thirty-two".