17661120004 has 24 divisors (see below), whose sum is σ = 35700019488. Its totient is φ = 7555559040.

The previous prime is 17661119981. The next prime is 17661120011. The reversal of 17661120004 is 40002116671.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11804814 + ... + 11806309.

It is an arithmetic number, because the mean of its divisors is an integer number (1487500812).

Almost surely, 2^17661120004 is an apocalyptic number.

It is an amenable number.

17661120004 is an abundant number, since it is smaller than the sum of its proper divisors (18038899484).

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

17661120004 is a wasteful number, since it uses less digits than its factorization.

17661120004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23611155 (or 23611153 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 17661120004 its reverse (40002116671), we get a palindrome (57663236675).

The spelling of 17661120004 in words is "seventeen billion, six hundred sixty-one million, one hundred twenty thousand, four".