53355973840 has 80 divisors (see below), whose sum is σ = 133711348176. Its totient is φ = 19683532800.

The previous prime is 53355973829. The next prime is 53355973871. The reversal of 53355973840 is 4837955335.

It can be written as a sum of positive squares in 8 ways, for example, as 592046224 + 52763927616 = 24332^2 + 229704^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 1206520 + ... + 1249960.

Almost surely, 2^53355973840 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 53355973840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66855674088).

53355973840 is an abundant number, since it is smaller than the sum of its proper divisors (80355374336).

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

53355973840 is a wasteful number, since it uses less digits than its factorization.

53355973840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44648 (or 44642 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 53355973840 in words is "fifty-three billion, three hundred fifty-five million, nine hundred seventy-three thousand, eight hundred forty".