4931720646 has 16 divisors (see below), whose sum is σ = 9900111600. Its totient is φ = 1637795168.

The previous prime is 4931720627. The next prime is 4931720663. The reversal of 4931720646 is 6460271394.

It is a junction number, because it is equal to n+sod(n) for n = 4931720598 and 4931720607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526181 + ... + 1529408.

It is an arithmetic number, because the mean of its divisors is an integer number (618756975).

Almost surely, 2^4931720646 is an apocalyptic number.

4931720646 is an abundant number, since it is smaller than the sum of its proper divisors (4968390954).

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

4931720646 is a wasteful number, since it uses less digits than its factorization.

4931720646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055863.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 4931720646 is about 70226.2105342443. The cubic root of 4931720646 is about 1702.1565073010.

The spelling of 4931720646 in words is "four billion, nine hundred thirty-one million, seven hundred twenty thousand, six hundred forty-six".