646747164742 has 16 divisors (see below), whose sum is σ = 1109892702240. Its totient is φ = 276881537088.

The previous prime is 646747164631. The next prime is 646747164779. The reversal of 646747164742 is 247461747646.

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, 24638017 + ... + 24664252.

It is an arithmetic number, because the mean of its divisors is an integer number (69368293890).

Almost surely, 2^646747164742 is an apocalyptic number.

646747164742 is a deficient number, since it is larger than the sum of its proper divisors (463145537498).

646747164742 is a wasteful number, since it uses less digits than its factorization.

646747164742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49303215.

The product of its digits is 37933056, while the sum is 58.

The spelling of 646747164742 in words is "six hundred forty-six billion, seven hundred forty-seven million, one hundred sixty-four thousand, seven hundred forty-two".