51345543125868 has 96 divisors (see below), whose sum is σ = 127938678067200. Its totient is φ = 15988306872384.

The previous prime is 51345543125843. The next prime is 51345543125873. The reversal of 51345543125868 is 86852134554315.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95375793 + ... + 95912631.

It is an arithmetic number, because the mean of its divisors is an integer number (1332694563200).

Almost surely, 2^{51345543125868} 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 51345543125868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63969339033600).

51345543125868 is an abundant number, since it is smaller than the sum of its proper divisors (76593134941332).

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

51345543125868 is a wasteful number, since it uses less digits than its factorization.

51345543125868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544971 (or 544969 counting only the distinct ones).

The product of its digits is 69120000, while the sum is 60.

The spelling of 51345543125868 in words is "fifty-one trillion, three hundred forty-five billion, five hundred forty-three million, one hundred twenty-five thousand, eight hundred sixty-eight".