511161132645 has 36 divisors (see below), whose sum is σ = 915515729388. Its totient is φ = 263825078400.

The previous prime is 511161132641. The next prime is 511161132653. The reversal of 511161132645 is 546231161115.

511161132645 is a `hidden beast` number, since 5 + 1 + 1 + 1 + 6 + 1 + 1 + 3 + 2 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 243500797764 + 267660334881 = 493458^2 + 517359^2 .

It is not a de Polignac number, because 511161132645 - 2² = 511161132641 is a prime.

It is a super-2 number, since 2×511161132645² (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 (511161132641) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5866816 + ... + 5953305.

It is an arithmetic number, because the mean of its divisors is an integer number (25430992483).

Almost surely, 2^511161132645 is an apocalyptic number.

It is an amenable number.

511161132645 is a deficient number, since it is larger than the sum of its proper divisors (404354596743).

511161132645 is a wasteful number, since it uses less digits than its factorization.

511161132645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11820194 (or 11820160 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The spelling of 511161132645 in words is "five hundred eleven billion, one hundred sixty-one million, one hundred thirty-two thousand, six hundred forty-five".