646484747 has 8 divisors (see below), whose sum is σ = 696336960. Its totient is φ = 598215240.

The previous prime is 646484731. The next prime is 646484801. The reversal of 646484747 is 747484646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646484747 - 2⁴ = 646484731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646484695 and 646484704.

It is not an unprimeable number, because it can be changed into a prime (646484717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394829 + ... + 396462.

It is an arithmetic number, because the mean of its divisors is an integer number (87042120).

Almost surely, 2^646484747 is an apocalyptic number.

646484747 is a deficient number, since it is larger than the sum of its proper divisors (49852213).

646484747 is a wasteful number, since it uses less digits than its factorization.

646484747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791353.

The product of its digits is 3612672, while the sum is 50.

The square root of 646484747 is about 25426.0643238390. The cubic root of 646484747 is about 864.6747179264.

The spelling of 646484747 in words is "six hundred forty-six million, four hundred eighty-four thousand, seven hundred forty-seven".