646612743 has 16 divisors (see below), whose sum is σ = 994357760. Its totient is φ = 366101856.

The previous prime is 646612727. The next prime is 646612783. The reversal of 646612743 is 347216646.

It is a happy number.

It is not a de Polignac number, because 646612743 - 2⁴ = 646612727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646612723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138955 + ... + 143532.

It is an arithmetic number, because the mean of its divisors is an integer number (62147360).

Almost surely, 2^646612743 is an apocalyptic number.

646612743 is a deficient number, since it is larger than the sum of its proper divisors (347745017).

646612743 is a wasteful number, since it uses less digits than its factorization.

646612743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282606.

The product of its digits is 145152, while the sum is 39.

The square root of 646612743 is about 25428.5812227108. The cubic root of 646612743 is about 864.7317791345.

The spelling of 646612743 in words is "six hundred forty-six million, six hundred twelve thousand, seven hundred forty-three".