5661605105598 has 128 divisors (see below), whose sum is σ = 12852447552000. Its totient is φ = 1650537165312.

The previous prime is 5661605105593. The next prime is 5661605105711. The reversal of 5661605105598 is 8955015061665.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661605105593) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27872961 + ... + 28075347.

It is an arithmetic number, because the mean of its divisors is an integer number (100409746500).

Almost surely, 2^{5661605105598} is an apocalyptic number.

5661605105598 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661605105598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6426223776000).

5661605105598 is an abundant number, since it is smaller than the sum of its proper divisors (7190842446402).

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

5661605105598 is a wasteful number, since it uses less digits than its factorization.

5661605105598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202666.

The product of its (nonzero) digits is 9720000, while the sum is 57.

The spelling of 5661605105598 in words is "five trillion, six hundred sixty-one billion, six hundred five million, one hundred five thousand, five hundred ninety-eight".