52820969978880 has 880 divisors, whose sum is σ = 200815266938880. Its totient is φ = 13238921428992.

The previous prime is 52820969978879. The next prime is 52820969978911. The reversal of 52820969978880 is 8887996902825.

It is a happy number.

52820969978880 is a `hidden beast` number, since 528 + 2 + 0 + 9 + 6 + 9 + 9 + 7 + 8 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 52820969978880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1000692969 + ... + 1000745751.

It is an arithmetic number, because the mean of its divisors is an integer number (228199166976).

Almost surely, 2^{52820969978880} 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 52820969978880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100407633469440).

52820969978880 is an abundant number, since it is smaller than the sum of its proper divisors (147994296960000).

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

52820969978880 is a wasteful number, since it uses less digits than its factorization.

52820969978880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52966 (or 52939 counting only the distinct ones).

The product of its (nonzero) digits is 2508226560, while the sum is 81.

The spelling of 52820969978880 in words is "fifty-two trillion, eight hundred twenty billion, nine hundred sixty-nine million, nine hundred seventy-eight thousand, eight hundred eighty".