53569391616 has 528 divisors, whose sum is σ = 177842377440. Its totient is φ = 15394406400.

The previous prime is 53569391587. The next prime is 53569391639. The reversal of 53569391616 is 61619396535.

53569391616 is a `hidden beast` number, since 53 + 569 + 3 + 9 + 16 + 16 = 666.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 229911436 + ... + 229911668.

Almost surely, 2^53569391616 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 53569391616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88921188720).

53569391616 is an abundant number, since it is smaller than the sum of its proper divisors (124272985824).

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

53569391616 is a wasteful number, since it uses less digits than its factorization.

53569391616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 371 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 54.

The spelling of 53569391616 in words is "fifty-three billion, five hundred sixty-nine million, three hundred ninety-one thousand, six hundred sixteen".