52438913680 has 20 divisors (see below), whose sum is σ = 121920474492. Its totient is φ = 20975565440.

The previous prime is 52438913633. The next prime is 52438913693. The reversal of 52438913680 is 8631983425.

It can be written as a sum of positive squares in 2 ways, for example, as 39761955216 + 12676958464 = 199404^2 + 112592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×52438913680² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327743131 + ... + 327743290.

Almost surely, 2^52438913680 is an apocalyptic number.

It is an amenable number.

52438913680 is an abundant number, since it is smaller than the sum of its proper divisors (69481560812).

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

52438913680 is a wasteful number, since it uses less digits than its factorization.

52438913680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655486434 (or 655486428 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 52438913680 in words is "fifty-two billion, four hundred thirty-eight million, nine hundred thirteen thousand, six hundred eighty".