511283688940 has 12 divisors (see below), whose sum is σ = 1073695746816. Its totient is φ = 204513475568.

The previous prime is 511283688911. The next prime is 511283688947. The reversal of 511283688940 is 49886382115.

It is a happy number.

It is a super-2 number, since 2×511283688940² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511283688947) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12782092204 + ... + 12782092243.

It is an arithmetic number, because the mean of its divisors is an integer number (89474645568).

Almost surely, 2^511283688940 is an apocalyptic number.

It is an amenable number.

511283688940 is an abundant number, since it is smaller than the sum of its proper divisors (562412057876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511283688940 is a wasteful number, since it uses less digits than its factorization.

511283688940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25564184456 (or 25564184454 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 511283688940 in words is "five hundred eleven billion, two hundred eighty-three million, six hundred eighty-eight thousand, nine hundred forty".