52687136840 has 128 divisors (see below), whose sum is σ = 133628140800. Its totient is φ = 18550287360.

The previous prime is 52687136839. The next prime is 52687136917. The reversal of 52687136840 is 4863178625.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3952106 + ... + 3965414.

It is an arithmetic number, because the mean of its divisors is an integer number (1043969850).

Almost surely, 2^52687136840 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 52687136840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66814070400).

52687136840 is an abundant number, since it is smaller than the sum of its proper divisors (80941003960).

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

52687136840 is a wasteful number, since it uses less digits than its factorization.

52687136840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13687 (or 13683 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 52687136840 in words is "fifty-two billion, six hundred eighty-seven million, one hundred thirty-six thousand, eight hundred forty".