51173162040 has 512 divisors, whose sum is σ = 207439626240. Its totient is φ = 9752832000.

The previous prime is 51173162003. The next prime is 51173162041. The reversal of 51173162040 is 4026137115.

51173162040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51173161989 and 51173162007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51173162041) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20058765 + ... + 20061315.

It is an arithmetic number, because the mean of its divisors is an integer number (405155520).

Almost surely, 2^51173162040 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 51173162040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103719813120).

51173162040 is an abundant number, since it is smaller than the sum of its proper divisors (156266464200).

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

51173162040 is a wasteful number, since it uses less digits than its factorization.

51173162040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 51173162040 its reverse (4026137115), we get a palindrome (55199299155).

The spelling of 51173162040 in words is "fifty-one billion, one hundred seventy-three million, one hundred sixty-two thousand, forty".