1611056000 has 128 divisors (see below), whose sum is σ = 4241820960. Its totient is φ = 606412800.

The previous prime is 1611055997. The next prime is 1611056003. The reversal of 1611056000 is 6501161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1611055997) and next prime (1611056003).

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611056003) 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, 269039 + ... + 274961.

Almost surely, 2^1611056000 is an apocalyptic number.

1611056000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1611056000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2120910480).

1611056000 is an abundant number, since it is smaller than the sum of its proper divisors (2630764960).

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

1611056000 is an equidigital number, since it uses as much as digits as its factorization.

1611056000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969 (or 5947 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1611056000 is about 40137.9620808033. The cubic root of 1611056000 is about 1172.2949088379.

Adding to 1611056000 its reverse (6501161), we get a palindrome (1617557161).

The spelling of 1611056000 in words is "one billion, six hundred eleven million, fifty-six thousand".