52081721490 has 64 divisors (see below), whose sum is σ = 128129081472. Its totient is φ = 13540800000.

The previous prime is 52081721467. The next prime is 52081721501. The reversal of 52081721490 is 9412718025.

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, 1970865 + ... + 1997115.

It is an arithmetic number, because the mean of its divisors is an integer number (2002016898).

Almost surely, 2^52081721490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52081721490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64064540736).

52081721490 is an abundant number, since it is smaller than the sum of its proper divisors (76047359982).

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

52081721490 is a wasteful number, since it uses less digits than its factorization.

52081721490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27915.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 52081721490 in words is "fifty-two billion, eighty-one million, seven hundred twenty-one thousand, four hundred ninety".