649836473165 has 12 divisors (see below), whose sum is σ = 857139679452. Its totient is φ = 472608343680.

The previous prime is 649836473159. The next prime is 649836473171. The reversal of 649836473165 is 561374638946.

It is an interprime number because it is at equal distance from previous prime (649836473159) and next prime (649836473171).

It can be written as a sum of positive squares in 2 ways, for example, as 222243416329 + 427593056836 = 471427^2 + 653906^2 .

It is not a de Polignac number, because 649836473165 - 2¹⁸ = 649836211021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 649836473098 and 649836473107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 537054332 + ... + 537055541.

It is an arithmetic number, because the mean of its divisors is an integer number (71428306621).

Almost surely, 2^649836473165 is an apocalyptic number.

It is an amenable number.

649836473165 is a deficient number, since it is larger than the sum of its proper divisors (207303206287).

649836473165 is a wasteful number, since it uses less digits than its factorization.

649836473165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074109900 (or 1074109889 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 62.

The spelling of 649836473165 in words is "six hundred forty-nine billion, eight hundred thirty-six million, four hundred seventy-three thousand, one hundred sixty-five".