1964287696625 has 16 divisors (see below), whose sum is σ = 2476703545680. Its totient is φ = 1555229836800.

The previous prime is 1964287696619. The next prime is 1964287696627. The reversal of 1964287696625 is 5266967824691.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1016564029504 + 947723667121 = 1008248^2 + 973511^2 .

It is not a de Polignac number, because 1964287696625 - 2²⁴ = 1964270919409 is a prime.

It is a super-2 number, since 2×1964287696625² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1964287696627) 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 in 15 ways as a sum of consecutive naturals, for example, 80989430 + ... + 81013679.

It is an arithmetic number, because the mean of its divisors is an integer number (154793971605).

Almost surely, 2^{1964287696625} is an apocalyptic number.

It is an amenable number.

1964287696625 is a deficient number, since it is larger than the sum of its proper divisors (512415849055).

1964287696625 is an equidigital number, since it uses as much as digits as its factorization.

1964287696625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162003221 (or 162003211 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 71.

The spelling of 1964287696625 in words is "one trillion, nine hundred sixty-four billion, two hundred eighty-seven million, six hundred ninety-six thousand, six hundred twenty-five".