1964783329669 has 2 divisors, whose sum is σ = 1964783329670. Its totient is φ = 1964783329668.

The previous prime is 1964783329603. The next prime is 1964783329693. The reversal of 1964783329669 is 9669233874691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1421412372900 + 543370956769 = 1192230^2 + 737137^2 .

It is an emirp because it is prime and its reverse (9669233874691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1964783329669 - 2¹¹ = 1964783327621 is a prime.

It is a super-2 number, since 2×1964783329669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964783323669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982391664834 + 982391664835.

It is an arithmetic number, because the mean of its divisors is an integer number (982391664835).

Almost surely, 2^{1964783329669} is an apocalyptic number.

It is an amenable number.

1964783329669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964783329669 is an equidigital number, since it uses as much as digits as its factorization.

1964783329669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 634894848, while the sum is 73.

The spelling of 1964783329669 in words is "one trillion, nine hundred sixty-four billion, seven hundred eighty-three million, three hundred twenty-nine thousand, six hundred sixty-nine".