640174463 has 2 divisors, whose sum is σ = 640174464. Its totient is φ = 640174462.

The previous prime is 640174421. The next prime is 640174487. The reversal of 640174463 is 364471046.

640174463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640174463 - 2⁸ = 640174207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640174363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320087231 + 320087232.

It is an arithmetic number, because the mean of its divisors is an integer number (320087232).

Almost surely, 2^640174463 is an apocalyptic number.

640174463 is a deficient number, since it is larger than the sum of its proper divisors (1).

640174463 is an equidigital number, since it uses as much as digits as its factorization.

640174463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 640174463 is about 25301.6691741869. The cubic root of 640174463 is about 861.8521749692.

The spelling of 640174463 in words is "six hundred forty million, one hundred seventy-four thousand, four hundred sixty-three".