20161541080356 has 192 divisors, whose sum is σ = 51769269888000. Its totient is φ = 6069627592704.

The previous prime is 20161541080339. The next prime is 20161541080459. The reversal of 20161541080356 is 65308014516102.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 795094830 + ... + 795120186.

It is an arithmetic number, because the mean of its divisors is an integer number (269631614000).

Almost surely, 2^{20161541080356} is an apocalyptic number.

20161541080356 is a gapful number since it is divisible by the number (26) 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 20161541080356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25884634944000).

20161541080356 is an abundant number, since it is smaller than the sum of its proper divisors (31607728807644).

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

20161541080356 is a wasteful number, since it uses less digits than its factorization.

20161541080356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26038 (or 26036 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

Adding to 20161541080356 its reverse (65308014516102), we get a palindrome (85469555596458).

The spelling of 20161541080356 in words is "twenty trillion, one hundred sixty-one billion, five hundred forty-one million, eighty thousand, three hundred fifty-six".