51115115632 has 40 divisors (see below), whose sum is σ = 115319020896. Its totient is φ = 21493145856.

The previous prime is 51115115621. The next prime is 51115115633. The reversal of 51115115632 is 23651151115.

It is a happy number.

51115115632 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 2×51115115632² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51115115594 and 51115115603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115115633) 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, 4299583 + ... + 4311454.

Almost surely, 2^51115115632 is an apocalyptic number.

It is an amenable number.

51115115632 is an abundant number, since it is smaller than the sum of its proper divisors (64203905264).

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

51115115632 is a wasteful number, since it uses less digits than its factorization.

51115115632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611105 (or 8611099 counting only the distinct ones).

The product of its digits is 4500, while the sum is 31.

Adding to 51115115632 its reverse (23651151115), we get a palindrome (74766266747).

The spelling of 51115115632 in words is "fifty-one billion, one hundred fifteen million, one hundred fifteen thousand, six hundred thirty-two".