53556378064 has 80 divisors (see below), whose sum is σ = 120387651840. Its totient is φ = 22605327360.

The previous prime is 53556378023. The next prime is 53556378103. The reversal of 53556378064 is 46087365535.

53556378064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8815732 + ... + 8821804.

It is an arithmetic number, because the mean of its divisors is an integer number (1504845648).

Almost surely, 2^53556378064 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 53556378064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60193825920).

53556378064 is an abundant number, since it is smaller than the sum of its proper divisors (66831273776).

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

53556378064 is a wasteful number, since it uses less digits than its factorization.

53556378064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7268 (or 7262 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 53556378064 in words is "fifty-three billion, five hundred fifty-six million, three hundred seventy-eight thousand, sixty-four".