511321664452 has 12 divisors (see below), whose sum is σ = 894821000976. Its totient is φ = 255658521320.

The previous prime is 511321664419. The next prime is 511321664461. The reversal of 511321664452 is 254466123115.

It is a super-2 number, since 2×511321664452² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20074 + ... + 1011457.

It is an arithmetic number, because the mean of its divisors is an integer number (74568416748).

Almost surely, 2^511321664452 is an apocalyptic number.

It is an amenable number.

511321664452 is a deficient number, since it is larger than the sum of its proper divisors (383499336524).

511321664452 is a wasteful number, since it uses less digits than its factorization.

511321664452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155458 (or 1155456 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

Adding to 511321664452 its reverse (254466123115), we get a palindrome (765787787567).

The spelling of 511321664452 in words is "five hundred eleven billion, three hundred twenty-one million, six hundred sixty-four thousand, four hundred fifty-two".