640336460054 has 8 divisors (see below), whose sum is σ = 971296877880. Its totient is φ = 316570834096.

The previous prime is 640336460041. The next prime is 640336460059. The reversal of 640336460054 is 450064633046.

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

It is a junction number, because it is equal to n+sod(n) for n = 640336459993 and 640336460020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640336460059) by changing a digit.

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, 1798697744 + ... + 1798698099.

It is an arithmetic number, because the mean of its divisors is an integer number (121412109735).

Almost surely, 2^640336460054 is an apocalyptic number.

640336460054 is a deficient number, since it is larger than the sum of its proper divisors (330960417826).

640336460054 is a wasteful number, since it uses less digits than its factorization.

640336460054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597395934.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 640336460054 in words is "six hundred forty billion, three hundred thirty-six million, four hundred sixty thousand, fifty-four".