511161061636 has 12 divisors (see below), whose sum is σ = 918708394828. Its totient is φ = 248672948832.

The previous prime is 511161061633. The next prime is 511161061669. The reversal of 511161061636 is 636160161115.

It can be written as a sum of positive squares in 2 ways, for example, as 482635878400 + 28525183236 = 694720^2 + 168894^2 .

It is a super-2 number, since 2×511161061636² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 511161061595 and 511161061604.

It is not an unprimeable number, because it can be changed into a prime (511161061633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726895331 + ... + 1726895626.

Almost surely, 2^511161061636 is an apocalyptic number.

It is an amenable number.

511161061636 is a deficient number, since it is larger than the sum of its proper divisors (407547333192).

511161061636 is a wasteful number, since it uses less digits than its factorization.

511161061636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453790998 (or 3453790996 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 511161061636 in words is "five hundred eleven billion, one hundred sixty-one million, sixty-one thousand, six hundred thirty-six".