647674067524 has 81 divisors (see below), whose sum is σ = 1259225968791. Its totient is φ = 291266701440.

The previous prime is 647674067461. The next prime is 647674067539. The reversal of 647674067524 is 425760476746.

The square root of 647674067524 is 804782.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 166204613124 + 481469454400 = 407682^2 + 693880^2 .

It is a super-2 number, since 2×647674067524² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

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 26 ways as a sum of consecutive naturals, for example, 2779716912 + ... + 2779717144.

Almost surely, 2^647674067524 is an apocalyptic number.

647674067524 is the 804782-nd square number.

It is an amenable number.

647674067524 is a deficient number, since it is larger than the sum of its proper divisors (611551901267).

647674067524 is a wasteful number, since it uses less digits than its factorization.

647674067524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 58.

The spelling of 647674067524 in words is "six hundred forty-seven billion, six hundred seventy-four million, sixty-seven thousand, five hundred twenty-four".