52638989820 has 96 divisors (see below), whose sum is σ = 152620614720. Its totient is φ = 13539778560.

The previous prime is 52638989807. The next prime is 52638989827. The reversal of 52638989820 is 2898983625.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52638989827) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1831884 + ... + 1860396.

It is an arithmetic number, because the mean of its divisors is an integer number (1589798070).

Almost surely, 2^52638989820 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 52638989820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76310307360).

52638989820 is an abundant number, since it is smaller than the sum of its proper divisors (99981624900).

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

52638989820 is a wasteful number, since it uses less digits than its factorization.

52638989820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29615 (or 29613 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 52638989820 in words is "fifty-two billion, six hundred thirty-eight million, nine hundred eighty-nine thousand, eight hundred twenty".