646344141 has 32 divisors (see below), whose sum is σ = 940032000. Its totient is φ = 393973440.

The previous prime is 646344113. The next prime is 646344143. The reversal of 646344141 is 141443646.

It is not a de Polignac number, because 646344141 - 2⁹ = 646343629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646344143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124210 + ... + 129308.

It is an arithmetic number, because the mean of its divisors is an integer number (29376000).

Almost surely, 2^646344141 is an apocalyptic number.

It is an amenable number.

646344141 is a deficient number, since it is larger than the sum of its proper divisors (293687859).

646344141 is a wasteful number, since it uses less digits than its factorization.

646344141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5209.

The product of its digits is 27648, while the sum is 33.

The square root of 646344141 is about 25423.2991761494. The cubic root of 646344141 is about 864.6120264403.

Adding to 646344141 its reverse (141443646), we get a palindrome (787787787).

The spelling of 646344141 in words is "six hundred forty-six million, three hundred forty-four thousand, one hundred forty-one".