52991604440 has 16 divisors (see below), whose sum is σ = 119231110080. Its totient is φ = 21196641760.

The previous prime is 52991604403. The next prime is 52991604473. The reversal of 52991604440 is 4440619925.

It is a super-2 number, since 2×52991604440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52991604391 and 52991604400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662395016 + ... + 662395095.

It is an arithmetic number, because the mean of its divisors is an integer number (7451944380).

Almost surely, 2^52991604440 is an apocalyptic number.

It is an amenable number.

52991604440 is an abundant number, since it is smaller than the sum of its proper divisors (66239505640).

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

52991604440 is a wasteful number, since it uses less digits than its factorization.

52991604440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324790122 (or 1324790118 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 52991604440 in words is "fifty-two billion, nine hundred ninety-one million, six hundred four thousand, four hundred forty".