51106451240 has 128 divisors (see below), whose sum is σ = 125244887040. Its totient is φ = 18656096256.

The previous prime is 51106451239. The next prime is 51106451273. The reversal of 51106451240 is 4215460115.

It is a super-2 number, since 2×51106451240² (a number of 22 digits) contains 22 as substring.

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, 30730649 + ... + 30732311.

It is an arithmetic number, because the mean of its divisors is an integer number (978475680).

Almost surely, 2^51106451240 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 51106451240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62622443520).

51106451240 is an abundant number, since it is smaller than the sum of its proper divisors (74138435800).

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

51106451240 is a wasteful number, since it uses less digits than its factorization.

51106451240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 51106451240 in words is "fifty-one billion, one hundred six million, four hundred fifty-one thousand, two hundred forty".