649375211513 has 40 divisors (see below), whose sum is σ = 776689895016. Its totient is φ = 542574412800.

The previous prime is 649375211497. The next prime is 649375211519. The reversal of 649375211513 is 315112573946.

It can be written as a sum of positive squares in 4 ways, for example, as 4625632144 + 644749579369 = 68012^2 + 802963^2 .

It is not a de Polignac number, because 649375211513 - 2⁴ = 649375211497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649375211519) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 169415045 + ... + 169418877.

Almost surely, 2^649375211513 is an apocalyptic number.

It is an amenable number.

649375211513 is a deficient number, since it is larger than the sum of its proper divisors (127314683503).

649375211513 is an equidigital number, since it uses as much as digits as its factorization.

649375211513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623 (or 5602 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The spelling of 649375211513 in words is "six hundred forty-nine billion, three hundred seventy-five million, two hundred eleven thousand, five hundred thirteen".