640462614461 has 2 divisors, whose sum is σ = 640462614462. Its totient is φ = 640462614460.

The previous prime is 640462614409. The next prime is 640462614487. The reversal of 640462614461 is 164416264046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455498108836 + 184964505625 = 674906^2 + 430075^2 .

It is a cyclic number.

It is not a de Polignac number, because 640462614461 - 2⁶ = 640462614397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640462614661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320231307230 + 320231307231.

It is an arithmetic number, because the mean of its divisors is an integer number (320231307231).

Almost surely, 2^640462614461 is an apocalyptic number.

It is an amenable number.

640462614461 is a deficient number, since it is larger than the sum of its proper divisors (1).

640462614461 is an equidigital number, since it uses as much as digits as its factorization.

640462614461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 640462614461 in words is "six hundred forty billion, four hundred sixty-two million, six hundred fourteen thousand, four hundred sixty-one".