511421655040 has 96 divisors (see below), whose sum is σ = 1234464416640. Its totient is φ = 203343020032.

The previous prime is 511421655037. The next prime is 511421655071. The reversal of 511421655040 is 40556124115.

It is a junction number, because it is equal to n+sod(n) for n = 511421654987 and 511421655005.

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, 1560549 + ... + 1859611.

It is an arithmetic number, because the mean of its divisors is an integer number (12859004340).

Almost surely, 2^511421655040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 511421655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617232208320).

511421655040 is an abundant number, since it is smaller than the sum of its proper divisors (723042761600).

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

511421655040 is a wasteful number, since it uses less digits than its factorization.

511421655040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299257 (or 299237 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 511421655040 its reverse (40556124115), we get a palindrome (551977779155).

The spelling of 511421655040 in words is "five hundred eleven billion, four hundred twenty-one million, six hundred fifty-five thousand, forty".