646587742 has 8 divisors (see below), whose sum is σ = 990517536. Its totient is φ = 316415232.

The previous prime is 646587731. The next prime is 646587751. The reversal of 646587742 is 247785646.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3439203 + ... + 3439390.

It is an arithmetic number, because the mean of its divisors is an integer number (123814692).

Almost surely, 2^646587742 is an apocalyptic number.

646587742 is a deficient number, since it is larger than the sum of its proper divisors (343929794).

646587742 is a wasteful number, since it uses less digits than its factorization.

646587742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878642.

The product of its digits is 2257920, while the sum is 49.

The square root of 646587742 is about 25428.0896254516. The cubic root of 646587742 is about 864.7206341650.

The spelling of 646587742 in words is "six hundred forty-six million, five hundred eighty-seven thousand, seven hundred forty-two".