647760646 has 32 divisors (see below), whose sum is σ = 1100887200. Its totient is φ = 283745280.

The previous prime is 647760583. The next prime is 647760671. The reversal of 647760646 is 646067746.

It is a junction number, because it is equal to n+sod(n) for n = 647760596 and 647760605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37206 + ... + 51766.

It is an arithmetic number, because the mean of its divisors is an integer number (34402725).

Almost surely, 2^647760646 is an apocalyptic number.

647760646 is a deficient number, since it is larger than the sum of its proper divisors (453126554).

647760646 is a wasteful number, since it uses less digits than its factorization.

647760646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14664.

The product of its (nonzero) digits is 1016064, while the sum is 46.

The square root of 647760646 is about 25451.1423319269. The cubic root of 647760646 is about 865.2431833215.

The spelling of 647760646 in words is "six hundred forty-seven million, seven hundred sixty thousand, six hundred forty-six".