511545253240 has 32 divisors (see below), whose sum is σ = 1315402080480. Its totient is φ = 175386943872.

The previous prime is 511545253229. The next prime is 511545253313. The reversal of 511545253240 is 42352545115.

It is a super-2 number, since 2×511545253240² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511545253240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913473387 + ... + 913473946.

It is an arithmetic number, because the mean of its divisors is an integer number (41106315015).

Almost surely, 2^511545253240 is an apocalyptic number.

It is an amenable number.

511545253240 is an abundant number, since it is smaller than the sum of its proper divisors (803856827240).

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

511545253240 is a wasteful number, since it uses less digits than its factorization.

511545253240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826947351 (or 1826947347 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 511545253240 its reverse (42352545115), we get a palindrome (553897798355).

The spelling of 511545253240 in words is "five hundred eleven billion, five hundred forty-five million, two hundred fifty-three thousand, two hundred forty".