53578841978766 has 128 divisors (see below), whose sum is σ = 126983402542080. Its totient is φ = 14912249223168.

The previous prime is 53578841978749. The next prime is 53578841978773. The reversal of 53578841978766 is 66787914887535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17574886 + ... + 20396918.

It is an arithmetic number, because the mean of its divisors is an integer number (992057832360).

Almost surely, 2^{53578841978766} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53578841978766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63491701271040).

53578841978766 is an abundant number, since it is smaller than the sum of its proper divisors (73404560563314).

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

53578841978766 is a wasteful number, since it uses less digits than its factorization.

53578841978766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822650.

The product of its digits is 17069875200, while the sum is 84.

The spelling of 53578841978766 in words is "fifty-three trillion, five hundred seventy-eight billion, eight hundred forty-one million, nine hundred seventy-eight thousand, seven hundred sixty-six".