1611613404 has 144 divisors (see below), whose sum is σ = 4507513920. Its totient is φ = 483732480.

The previous prime is 1611613397. The next prime is 1611613411. The reversal of 1611613404 is 4043161161.

1611613404 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 613 + 40 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1611613397) and next prime (1611613411).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 983674 + ... + 985310.

It is an arithmetic number, because the mean of its divisors is an integer number (31302180).

Almost surely, 2^1611613404 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 1611613404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2253756960).

1611613404 is an abundant number, since it is smaller than the sum of its proper divisors (2895900516).

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

1611613404 is a wasteful number, since it uses less digits than its factorization.

1611613404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1611613404 is about 40144.9050814671. The cubic root of 1611613404 is about 1172.4300927432.

Adding to 1611613404 its reverse (4043161161), we get a palindrome (5654774565).

The spelling of 1611613404 in words is "one billion, six hundred eleven million, six hundred thirteen thousand, four hundred four".