51281107086 has 64 divisors (see below), whose sum is σ = 113669256960. Its totient is φ = 15292527360.

The previous prime is 51281107067. The next prime is 51281107177. The reversal of 51281107086 is 68070118215.

It is a super-2 number, since 2×51281107086² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4898770 + ... + 4909226.

It is an arithmetic number, because the mean of its divisors is an integer number (1776082140).

Almost surely, 2^51281107086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51281107086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56834628480).

51281107086 is an abundant number, since it is smaller than the sum of its proper divisors (62388149874).

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

51281107086 is a wasteful number, since it uses less digits than its factorization.

51281107086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11649.

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 51281107086 in words is "fifty-one billion, two hundred eighty-one million, one hundred seven thousand, eighty-six".