511611151161 has 8 divisors (see below), whose sum is σ = 744161674464. Its totient is φ = 310067364320.

The previous prime is 511611151141. The next prime is 511611151171. The reversal of 511611151161 is 161151116115.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 511611151161 - 2¹³ = 511611142969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (511611151141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7751684076 + ... + 7751684141.

It is an arithmetic number, because the mean of its divisors is an integer number (93020209308).

Almost surely, 2^511611151161 is an apocalyptic number.

It is an amenable number.

511611151161 is a deficient number, since it is larger than the sum of its proper divisors (232550523303).

511611151161 is a wasteful number, since it uses less digits than its factorization.

511611151161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15503368231.

The product of its digits is 900, while the sum is 30.

Adding to 511611151161 its reverse (161151116115), we get a palindrome (672762267276).

The spelling of 511611151161 in words is "five hundred eleven billion, six hundred eleven million, one hundred fifty-one thousand, one hundred sixty-one".