5251578240768 has 144 divisors (see below), whose sum is σ = 14800608055296. Its totient is φ = 1647377694720.

The previous prime is 5251578240761. The next prime is 5251578240781. The reversal of 5251578240768 is 8670428751525.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251578240761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179152833 + ... + 179182143.

It is an arithmetic number, because the mean of its divisors is an integer number (102782000384).

Almost surely, 2^{5251578240768} 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 5251578240768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7400304027648).

5251578240768 is an abundant number, since it is smaller than the sum of its proper divisors (9549029814528).

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

5251578240768 is a wasteful number, since it uses less digits than its factorization.

5251578240768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43070 (or 43056 counting only the distinct ones).

The product of its (nonzero) digits is 37632000, while the sum is 60.

The spelling of 5251578240768 in words is "five trillion, two hundred fifty-one billion, five hundred seventy-eight million, two hundred forty thousand, seven hundred sixty-eight".