1964502250639 has 2 divisors, whose sum is σ = 1964502250640. Its totient is φ = 1964502250638.

The previous prime is 1964502250637. The next prime is 1964502250649. The reversal of 1964502250639 is 9360522054691.

It is a weak prime.

It is an emirp because it is prime and its reverse (9360522054691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1964502250639 - 2¹ = 1964502250637 is a prime.

Together with 1964502250637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964502250637) 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, 982251125319 + 982251125320.

It is an arithmetic number, because the mean of its divisors is an integer number (982251125320).

Almost surely, 2^{1964502250639} is an apocalyptic number.

1964502250639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964502250639 is an equidigital number, since it uses as much as digits as its factorization.

1964502250639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 1964502250639 in words is "one trillion, nine hundred sixty-four billion, five hundred two million, two hundred fifty thousand, six hundred thirty-nine".