2261161113354 has 256 divisors, whose sum is σ = 5968077373440. Its totient is φ = 625564270080.

The previous prime is 2261161113223. The next prime is 2261161113359. The reversal of 2261161113354 is 4533111611622.

2261161113354 is a `hidden beast` number, since 2 + 2 + 6 + 1 + 1 + 611 + 1 + 3 + 35 + 4 = 666.

It is a super-2 number, since 2×2261161113354² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261161113359) 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, 948870447 + ... + 948872829.

It is an arithmetic number, because the mean of its divisors is an integer number (23312802240).

Almost surely, 2^{2261161113354} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2261161113354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2984038686720).

2261161113354 is an abundant number, since it is smaller than the sum of its proper divisors (3706916260086).

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

2261161113354 is a wasteful number, since it uses less digits than its factorization.

2261161113354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714 (or 3708 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

Adding to 2261161113354 its reverse (4533111611622), we get a palindrome (6794272724976).

The spelling of 2261161113354 in words is "two trillion, two hundred sixty-one billion, one hundred sixty-one million, one hundred thirteen thousand, three hundred fifty-four".