511005510061 has 4 divisors (see below), whose sum is σ = 511009249500. Its totient is φ = 511001770624.

The previous prime is 511005510031. The next prime is 511005510073. The reversal of 511005510061 is 160015500115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174018294025 + 336987216036 = 417155^2 + 580506^2 .

It is a cyclic number.

It is not a de Polignac number, because 511005510061 - 2¹³ = 511005501869 is a prime.

It is a super-2 number, since 2×511005510061² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511005510031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656646 + ... + 1940743.

It is an arithmetic number, because the mean of its divisors is an integer number (127752312375).

Almost surely, 2^511005510061 is an apocalyptic number.

It is an amenable number.

511005510061 is a deficient number, since it is larger than the sum of its proper divisors (3739439).

511005510061 is a wasteful number, since it uses less digits than its factorization.

511005510061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739438.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 511005510061 in words is "five hundred eleven billion, five million, five hundred ten thousand, sixty-one".