511061340521 has 16 divisors (see below), whose sum is σ = 531449614080. Its totient is φ = 491090862720.

The previous prime is 511061340511. The next prime is 511061340523. The reversal of 511061340521 is 125043160115.

It is a de Polignac number, because none of the positive numbers 2^k-511061340521 is a prime.

It is a super-2 number, since 2×511061340521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (511061340523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2094461 + ... + 2325701.

It is an arithmetic number, because the mean of its divisors is an integer number (33215600880).

Almost surely, 2^511061340521 is an apocalyptic number.

It is an amenable number.

511061340521 is a deficient number, since it is larger than the sum of its proper divisors (20388273559).

511061340521 is a wasteful number, since it uses less digits than its factorization.

511061340521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232144.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 511061340521 in words is "five hundred eleven billion, sixty-one million, three hundred forty thousand, five hundred twenty-one".