511840671853 has 12 divisors (see below), whose sum is σ = 596891322972. Its totient is φ = 437626492800.

The previous prime is 511840671809. The next prime is 511840671883. The reversal of 511840671853 is 358176048115.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 440913264169 + 70927407684 = 664013^2 + 266322^2 .

It is not a de Polignac number, because 511840671853 - 2³³ = 503250737261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 511840671797 and 511840671806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511840671883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13004950 + ... + 13044247.

It is an arithmetic number, because the mean of its divisors is an integer number (49740943581).

Almost surely, 2^511840671853 is an apocalyptic number.

It is an amenable number.

511840671853 is a deficient number, since it is larger than the sum of its proper divisors (85050651119).

511840671853 is a wasteful number, since it uses less digits than its factorization.

511840671853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26049612 (or 26049605 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 511840671853 in words is "five hundred eleven billion, eight hundred forty million, six hundred seventy-one thousand, eight hundred fifty-three".