1135771648 has 128 divisors (see below), whose sum is σ = 2604623040. Its totient is φ = 490209280.

The previous prime is 1135771643. The next prime is 1135771657. The reversal of 1135771648 is 8461775311.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1135771643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8290236 + ... + 8290372.

Almost surely, 2^1135771648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1135771648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302311520).

1135771648 is an abundant number, since it is smaller than the sum of its proper divisors (1468851392).

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

1135771648 is an equidigital number, since it uses as much as digits as its factorization.

1135771648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 173 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The square root of 1135771648 is about 33701.2113728869. The cubic root of 1135771648 is about 1043.3507704853.

The spelling of 1135771648 in words is "one billion, one hundred thirty-five million, seven hundred seventy-one thousand, six hundred forty-eight".