640123321046 has 8 divisors (see below), whose sum is σ = 1047474525384. Its totient is φ = 290965145920.

The previous prime is 640123321031. The next prime is 640123321069.

640123321046 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×640123321046² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14548257275 + ... + 14548257318.

It is an arithmetic number, because the mean of its divisors is an integer number (130934315673).

Almost surely, 2^640123321046 is an apocalyptic number.

640123321046 is a deficient number, since it is larger than the sum of its proper divisors (407351204338).

640123321046 is a wasteful number, since it uses less digits than its factorization.

640123321046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29096514606.

The product of its (nonzero) digits is 20736, while the sum is 32.

It can be divided in two parts, 640123 and 321046, that added together give a palindrome (961169).

The spelling of 640123321046 in words is "six hundred forty billion, one hundred twenty-three million, three hundred twenty-one thousand, forty-six".