52748720640 has 1920 divisors, whose sum is σ = 253918748160. Its totient is φ = 10121379840.

The previous prime is 52748720611. The next prime is 52748720677. The reversal of 52748720640 is 4602784725.

It is a happy number.

52748720640 is a `hidden beast` number, since 527 + 4 + 87 + 2 + 0 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 995258854 + ... + 995258906.

It is an arithmetic number, because the mean of its divisors is an integer number (132249348).

Almost surely, 2^52748720640 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 52748720640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126959374080).

52748720640 is an abundant number, since it is smaller than the sum of its proper divisors (201170027520).

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

52748720640 is a wasteful number, since it uses less digits than its factorization.

52748720640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 52748720640 in words is "fifty-two billion, seven hundred forty-eight million, seven hundred twenty thousand, six hundred forty".