51111011160 has 192 divisors, whose sum is σ = 186109915680. Its totient is φ = 12055633920.

The previous prime is 51111011143. The next prime is 51111011201. The reversal of 51111011160 is 6111011115.

It is a happy number.

51111011160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51111011160² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27897 + ... + 320936.

Almost surely, 2^51111011160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51111011160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93054957840).

51111011160 is an abundant number, since it is smaller than the sum of its proper divisors (134998904520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111011160 is a wasteful number, since it uses less digits than its factorization.

51111011160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348898 (or 348891 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

Adding to 51111011160 its reverse (6111011115), we get a palindrome (57222022275).

The spelling of 51111011160 in words is "fifty-one billion, one hundred eleven million, eleven thousand, one hundred sixty".