51050000861860 has 192 divisors, whose sum is σ = 144056771550720. Its totient is φ = 14675754516480.

The previous prime is 51050000861809. The next prime is 51050000861869. The reversal of 51050000861860 is 6816800005015.

It is a super-2 number, since 2×51050000861860² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51050000861869) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23567172 + ... + 25641988.

It is an arithmetic number, because the mean of its divisors is an integer number (750295685160).

Almost surely, 2^{51050000861860} 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 51050000861860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72028385775360).

51050000861860 is an abundant number, since it is smaller than the sum of its proper divisors (93006770688860).

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

51050000861860 is a wasteful number, since it uses less digits than its factorization.

51050000861860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076086 (or 2076084 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

Adding to 51050000861860 its reverse (6816800005015), we get a palindrome (57866800866875).

The spelling of 51050000861860 in words is "fifty-one trillion, fifty billion, eight hundred sixty-one thousand, eight hundred sixty".