511212339864 has 48 divisors (see below), whose sum is σ = 1384613118720. Its totient is φ = 170394304320.

The previous prime is 511212339863. The next prime is 511212339877. The reversal of 511212339864 is 468933212115.

511212339864 is a `hidden beast` number, since 511 + 2 + 1 + 23 + 39 + 86 + 4 = 666.

It is a super-2 number, since 2×511212339864² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511212339863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1113769 + ... + 1504295.

It is an arithmetic number, because the mean of its divisors is an integer number (28846106640).

Almost surely, 2^511212339864 is an apocalyptic number.

It is an amenable number.

511212339864 is an abundant number, since it is smaller than the sum of its proper divisors (873400778856).

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

511212339864 is a wasteful number, since it uses less digits than its factorization.

511212339864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408720 (or 408713 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 511212339864 in words is "five hundred eleven billion, two hundred twelve million, three hundred thirty-nine thousand, eight hundred sixty-four".