53645202720 has 384 divisors, whose sum is σ = 199286438400. Its totient is φ = 13431177216.

The previous prime is 53645202649. The next prime is 53645202727. The reversal of 53645202720 is 2720254635.

53645202720 is a `hidden beast` number, since 5 + 3 + 64 + 520 + 2 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (53645202727) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47515116 + ... + 47516244.

It is an arithmetic number, because the mean of its divisors is an integer number (518975100).

Almost surely, 2^53645202720 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 53645202720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99643219200).

53645202720 is an abundant number, since it is smaller than the sum of its proper divisors (145641235680).

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

53645202720 is a wasteful number, since it uses less digits than its factorization.

53645202720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 53645202720 in words is "fifty-three billion, six hundred forty-five million, two hundred two thousand, seven hundred twenty".