1611456000 has 640 divisors, whose sum is σ = 6740997120. Its totient is φ = 331776000.

The previous prime is 1611455953. The next prime is 1611456013. The reversal of 1611456000 is 6541161.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14783946 + ... + 14784054.

It is an arithmetic number, because the mean of its divisors is an integer number (10532808).

Almost surely, 2^1611456000 is an apocalyptic number.

1611456000 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 1611456000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3370498560).

1611456000 is an abundant number, since it is smaller than the sum of its proper divisors (5129541120).

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

1611456000 is a wasteful number, since it uses less digits than its factorization.

1611456000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1611456000 is about 40142.9445855682. The cubic root of 1611456000 is about 1172.3919216379.

Adding to 1611456000 its reverse (6541161), we get a palindrome (1617997161).

The spelling of 1611456000 in words is "one billion, six hundred eleven million, four hundred fifty-six thousand".