53651521920 has 256 divisors, whose sum is σ = 177357600000. Its totient is φ = 13778903040.

The previous prime is 53651521907. The next prime is 53651521927. The reversal of 53651521920 is 2912515635.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53651521927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27783355 + ... + 27785285.

It is an arithmetic number, because the mean of its divisors is an integer number (692803125).

Almost surely, 2^53651521920 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 53651521920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88678800000).

53651521920 is an abundant number, since it is smaller than the sum of its proper divisors (123706078080).

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

53651521920 is a wasteful number, since it uses less digits than its factorization.

53651521920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 53651521920 in words is "fifty-three billion, six hundred fifty-one million, five hundred twenty-one thousand, nine hundred twenty".