511643648253 has 16 divisors (see below), whose sum is σ = 711908701056. Its totient is φ = 326239541760.

The previous prime is 511643648239. The next prime is 511643648279. The reversal of 511643648253 is 352846346115.

It is not a de Polignac number, because 511643648253 - 2⁶ = 511643648189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511643648353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597301 + ... + 1174757.

It is an arithmetic number, because the mean of its divisors is an integer number (44494293816).

Almost surely, 2^511643648253 is an apocalyptic number.

It is an amenable number.

511643648253 is a deficient number, since it is larger than the sum of its proper divisors (200265052803).

511643648253 is a wasteful number, since it uses less digits than its factorization.

511643648253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590324.

The product of its digits is 2073600, while the sum is 48.

The spelling of 511643648253 in words is "five hundred eleven billion, six hundred forty-three million, six hundred forty-eight thousand, two hundred fifty-three".