640174551473 has 16 divisors (see below), whose sum is σ = 689605017600. Its totient is φ = 592546577040.

The previous prime is 640174551451. The next prime is 640174551479. The reversal of 640174551473 is 374155471046.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640174551473 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640174551479) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15779108 + ... + 15819626.

It is an arithmetic number, because the mean of its divisors is an integer number (43100313600).

Almost surely, 2^640174551473 is an apocalyptic number.

It is an amenable number.

640174551473 is a deficient number, since it is larger than the sum of its proper divisors (49430466127).

640174551473 is a wasteful number, since it uses less digits than its factorization.

640174551473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62732.

The product of its (nonzero) digits is 1411200, while the sum is 47.

The spelling of 640174551473 in words is "six hundred forty billion, one hundred seventy-four million, five hundred fifty-one thousand, four hundred seventy-three".