1955816226 has 256 divisors, whose sum is σ = 5687377920. Its totient is φ = 484289280.

The previous prime is 1955816209. The next prime is 1955816227. The reversal of 1955816226 is 6226185591.

1955816226 is a `hidden beast` number, since 1 + 9 + 5 + 581 + 62 + 2 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (1955816227) 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, 5636185 + ... + 5636531.

It is an arithmetic number, because the mean of its divisors is an integer number (22216320).

Almost surely, 2^1955816226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955816226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2843688960).

1955816226 is an abundant number, since it is smaller than the sum of its proper divisors (3731561694).

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

1955816226 is a wasteful number, since it uses less digits than its factorization.

1955816226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 440 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1955816226 is about 44224.6110893018. The cubic root of 1955816226 is about 1250.5738647164.

The spelling of 1955816226 in words is "one billion, nine hundred fifty-five million, eight hundred sixteen thousand, two hundred twenty-six".