640505046 has 16 divisors (see below), whose sum is σ = 1285106544. Its totient is φ = 212818944.

The previous prime is 640505023. The next prime is 640505051.

640505046 is nontrivially palindromic in base 10.

640505046 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 168651 + ... + 172406.

It is an arithmetic number, because the mean of its divisors is an integer number (80319159).

Almost surely, 2^640505046 is an apocalyptic number.

640505046 is an abundant number, since it is smaller than the sum of its proper divisors (644601498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640505046 is a wasteful number, since it uses less digits than its factorization.

640505046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341375.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 640505046 is about 25308.2011608885. The cubic root of 640505046 is about 862.0005015402. Note that the first 3 decimals are identical.

It can be divided in two parts, 64050 and 5046, that added together give a palindrome (69096).

The spelling of 640505046 in words is "six hundred forty million, five hundred five thousand, forty-six".