1538606045220 has 384 divisors, whose sum is σ = 4535814205440. Its totient is φ = 389423923200.

The previous prime is 1538606045191. The next prime is 1538606045227. The reversal of 1538606045220 is 225406068351.

It is not an unprimeable number, because it can be changed into a prime (1538606045227) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3212120941 + ... + 3212121419.

It is an arithmetic number, because the mean of its divisors is an integer number (11812016160).

Almost surely, 2^{1538606045220} is an apocalyptic number.

1538606045220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538606045220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267907102720).

1538606045220 is an abundant number, since it is smaller than the sum of its proper divisors (2997208160220).

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

1538606045220 is a wasteful number, since it uses less digits than its factorization.

1538606045220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 1538606045220 in words is "one trillion, five hundred thirty-eight billion, six hundred six million, forty-five thousand, two hundred twenty".