649436836325 has 6 divisors (see below), whose sum is σ = 805301677074. Its totient is φ = 519549469040.

The previous prime is 649436836291. The next prime is 649436836333. The reversal of 649436836325 is 523638634946.

It can be written as a sum of positive squares in 3 ways, for example, as 64857318241 + 584579518084 = 254671^2 + 764578^2 .

It is not a de Polignac number, because 649436836325 - 2¹⁰ = 649436835301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 12988736702 + ... + 12988736751.

It is an arithmetic number, because the mean of its divisors is an integer number (134216946179).

Almost surely, 2^649436836325 is an apocalyptic number.

It is an amenable number.

649436836325 is a deficient number, since it is larger than the sum of its proper divisors (155864840749).

649436836325 is a wasteful number, since it uses less digits than its factorization.

649436836325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25977473463 (or 25977473458 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 59.

The spelling of 649436836325 in words is "six hundred forty-nine billion, four hundred thirty-six million, eight hundred thirty-six thousand, three hundred twenty-five".