64206531631493 has 2 divisors, whose sum is σ = 64206531631494. Its totient is φ = 64206531631492.

The previous prime is 64206531631453. The next prime is 64206531631547. The reversal of 64206531631493 is 39413613560246.

64206531631493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63296631222724 + 909900408769 = 7955918^2 + 953887^2 .

It is a cyclic number.

It is not a de Polignac number, because 64206531631493 - 2¹⁰ = 64206531630469 is a prime.

It is a super-2 number, since 2×64206531631493² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64206531631453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32103265815746 + 32103265815747.

It is an arithmetic number, because the mean of its divisors is an integer number (32103265815747).

Almost surely, 2^{64206531631493} is an apocalyptic number.

It is an amenable number.

64206531631493 is a deficient number, since it is larger than the sum of its proper divisors (1).

64206531631493 is an equidigital number, since it uses as much as digits as its factorization.

64206531631493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 53.

The spelling of 64206531631493 in words is "sixty-four trillion, two hundred six billion, five hundred thirty-one million, six hundred thirty-one thousand, four hundred ninety-three".