5252638338640 has 160 divisors (see below), whose sum is σ = 15231021152256. Its totient is φ = 1636627745280.

The previous prime is 5252638338601. The next prime is 5252638338683. The reversal of 5252638338640 is 468338362525.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent 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, 18108189 + ... + 18395971.

Almost surely, 2^{5252638338640} 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 5252638338640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7615510576128).

5252638338640 is an abundant number, since it is smaller than the sum of its proper divisors (9978382813616).

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

5252638338640 is a wasteful number, since it uses less digits than its factorization.

5252638338640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290777 (or 290771 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 55.

The spelling of 5252638338640 in words is "five trillion, two hundred fifty-two billion, six hundred thirty-eight million, three hundred thirty-eight thousand, six hundred forty".