640162608454 has 8 divisors (see below), whose sum is σ = 1010783066040. Its totient is φ = 303234919776.

The previous prime is 640162608431. The next prime is 640162608487. The reversal of 640162608454 is 454806261046.

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

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 3 ways as a sum of consecutive naturals, for example, 8423192179 + ... + 8423192254.

It is an arithmetic number, because the mean of its divisors is an integer number (126347883255).

Almost surely, 2^640162608454 is an apocalyptic number.

640162608454 is a deficient number, since it is larger than the sum of its proper divisors (370620457586).

640162608454 is a wasteful number, since it uses less digits than its factorization.

640162608454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16846384454.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 640162608454 in words is "six hundred forty billion, one hundred sixty-two million, six hundred eight thousand, four hundred fifty-four".