511161253561 has 8 divisors (see below), whose sum is σ = 618548071680. Its totient is φ = 412365380928.

The previous prime is 511161253531. The next prime is 511161253583. The reversal of 511161253561 is 165352161115.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511161253561 is a prime.

It is a super-2 number, since 2×511161253561² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511161253561.

It is not an unprimeable number, because it can be changed into a prime (511161253531) 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 7 ways as a sum of consecutive naturals, for example, 2147736241 + ... + 2147736478.

It is an arithmetic number, because the mean of its divisors is an integer number (77318508960).

Almost surely, 2^511161253561 is an apocalyptic number.

It is an amenable number.

511161253561 is a deficient number, since it is larger than the sum of its proper divisors (107386818119).

511161253561 is a wasteful number, since it uses less digits than its factorization.

511161253561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295472743.

The product of its digits is 27000, while the sum is 37.

The spelling of 511161253561 in words is "five hundred eleven billion, one hundred sixty-one million, two hundred fifty-three thousand, five hundred sixty-one".