640234432046 has 16 divisors (see below), whose sum is σ = 1052152730928. Its totient is φ = 289766654400.

The previous prime is 640234432037. The next prime is 640234432091.

640234432046 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×640234432046² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62444585 + ... + 62454836.

It is an arithmetic number, because the mean of its divisors is an integer number (65759545683).

Almost surely, 2^640234432046 is an apocalyptic number.

640234432046 is a deficient number, since it is larger than the sum of its proper divisors (411918298882).

640234432046 is a wasteful number, since it uses less digits than its factorization.

640234432046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124899667.

The product of its (nonzero) digits is 331776, while the sum is 38.

The spelling of 640234432046 in words is "six hundred forty billion, two hundred thirty-four million, four hundred thirty-two thousand, forty-six".