1611001128 has 64 divisors (see below), whose sum is σ = 4401745920. Its totient is φ = 487281600.

The previous prime is 1611001109. The next prime is 1611001129. The reversal of 1611001128 is 8211001161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1611001129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145401 + ... + 156087.

It is an arithmetic number, because the mean of its divisors is an integer number (68777280).

Almost surely, 2^1611001128 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 1611001128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2200872960).

1611001128 is an abundant number, since it is smaller than the sum of its proper divisors (2790744792).

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

1611001128 is a wasteful number, since it uses less digits than its factorization.

1611001128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11278 (or 11274 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 21.

The square root of 1611001128 is about 40137.2785325562. The cubic root of 1611001128 is about 1172.2815993695.

Adding to 1611001128 its reverse (8211001161), we get a palindrome (9822002289).

The spelling of 1611001128 in words is "one billion, six hundred eleven million, one thousand, one hundred twenty-eight".