9225437778 has 18 divisors (see below), whose sum is σ = 19989331479. Its totient is φ = 3075010092.

The previous prime is 9225437773. The next prime is 9225437803. The reversal of 9225437778 is 8777345229.

9225437778 is a `hidden beast` number, since 9 + 22 + 543 + 7 + 7 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4612718889 + 4612718889 = 67917^2 + 67917^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=67917.

It is not an unprimeable number, because it can be changed into a prime (9225437773) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 396183 + ... + 418821.

Almost surely, 2^9225437778 is an apocalyptic number.

9225437778 is an abundant number, since it is smaller than the sum of its proper divisors (10763893701).

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

9225437778 is an frugal number, since it uses more digits than its factorization.

9225437778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45286 (or 22644 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The square root of 9225437778 is about 96049.1425156935. The cubic root of 9225437778 is about 2097.3085533652.

The spelling of 9225437778 in words is "nine billion, two hundred twenty-five million, four hundred thirty-seven thousand, seven hundred seventy-eight".