538693340640 has 288 divisors, whose sum is σ = 2099949981696. Its totient is φ = 113658255360.

The previous prime is 538693340587. The next prime is 538693340699. The reversal of 538693340640 is 46043396835.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93505 + ... + 1042175.

It is an arithmetic number, because the mean of its divisors is an integer number (7291492992).

Almost surely, 2^538693340640 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 538693340640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049974990848).

538693340640 is an abundant number, since it is smaller than the sum of its proper divisors (1561256641056).

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

538693340640 is a wasteful number, since it uses less digits than its factorization.

538693340640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948722 (or 948701 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 538693340640 in words is "five hundred thirty-eight billion, six hundred ninety-three million, three hundred forty thousand, six hundred forty".