511321666252 has 6 divisors (see below), whose sum is σ = 894812915948. Its totient is φ = 255660833124.

The previous prime is 511321666231. The next prime is 511321666253. The reversal of 511321666252 is 252666123115.

It is a super-2 number, since 2×511321666252² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511321666253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63915208278 + ... + 63915208285.

Almost surely, 2^511321666252 is an apocalyptic number.

It is an amenable number.

511321666252 is a deficient number, since it is larger than the sum of its proper divisors (383491249696).

511321666252 is a wasteful number, since it uses less digits than its factorization.

511321666252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127830416567 (or 127830416565 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

Adding to 511321666252 its reverse (252666123115), we get a palindrome (763987789367).

The spelling of 511321666252 in words is "five hundred eleven billion, three hundred twenty-one million, six hundred sixty-six thousand, two hundred fifty-two".