646738141 has 16 divisors (see below), whose sum is σ = 759386880. Its totient is φ = 539233920.

The previous prime is 646738129. The next prime is 646738177. The reversal of 646738141 is 141837646.

646738141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 646738141 - 2⁵ = 646738109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646738094 and 646738103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646738111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99895 + ... + 106171.

It is an arithmetic number, because the mean of its divisors is an integer number (47461680).

Almost surely, 2^646738141 is an apocalyptic number.

It is an amenable number.

646738141 is a deficient number, since it is larger than the sum of its proper divisors (112648739).

646738141 is a wasteful number, since it uses less digits than its factorization.

646738141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684.

The product of its digits is 96768, while the sum is 40.

The square root of 646738141 is about 25431.0467932407. The cubic root of 646738141 is about 864.7876748402.

The spelling of 646738141 in words is "six hundred forty-six million, seven hundred thirty-eight thousand, one hundred forty-one".