5561105978 has 16 divisors (see below), whose sum is σ = 8538183456. Its totient is φ = 2715083280.

The previous prime is 5561105969. The next prime is 5561105981. The reversal of 5561105978 is 8795011655.

It is a Curzon number.

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, 367808 + ... + 382628.

It is an arithmetic number, because the mean of its divisors is an integer number (533636466).

Almost surely, 2^5561105978 is an apocalyptic number.

5561105978 is a deficient number, since it is larger than the sum of its proper divisors (2977077478).

5561105978 is a wasteful number, since it uses less digits than its factorization.

5561105978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19229.

The product of its (nonzero) digits is 378000, while the sum is 47.

The square root of 5561105978 is about 74572.8233205636. The cubic root of 5561105978 is about 1771.6872393855.

The spelling of 5561105978 in words is "five billion, five hundred sixty-one million, one hundred five thousand, nine hundred seventy-eight".