511323674761 has 3 divisors (see below), whose sum is σ = 511324389831. Its totient is φ = 511322959692.

The previous prime is 511323674753. The next prime is 511323674777. The reversal of 511323674761 is 167476323115.

It is a happy number.

The square root of 511323674761 is 715069.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9804762361 + 501518912400 = 99019^2 + 708180^2 .

It is not a de Polignac number, because 511323674761 - 2³ = 511323674753 is a prime.

It is a super-2 number, since 2×511323674761² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511323674861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 357535 + ... + 1072603.

It is an arithmetic number, because the mean of its divisors is an integer number (170441463277).

Almost surely, 2^511323674761 is an apocalyptic number.

511323674761 is the 715069-th square number.

511323674761 is the 357535-th centered octagonal number.

It is an amenable number.

511323674761 is a deficient number, since it is larger than the sum of its proper divisors (715070).

511323674761 is an frugal number, since it uses more digits than its factorization.

511323674761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430138 (or 715069 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

Adding to 511323674761 its reverse (167476323115), we get a palindrome (678799997876).

The spelling of 511323674761 in words is "five hundred eleven billion, three hundred twenty-three million, six hundred seventy-four thousand, seven hundred sixty-one".