5561997807 has 8 divisors (see below), whose sum is σ = 7416734976. Its totient is φ = 3707629592.

The previous prime is 5561997781. The next prime is 5561997853. The reversal of 5561997807 is 7087991655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5561997807 - 2¹² = 5561993711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561997887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54903 + ... + 118904.

It is an arithmetic number, because the mean of its divisors is an integer number (927091872).

Almost surely, 2^5561997807 is an apocalyptic number.

5561997807 is a deficient number, since it is larger than the sum of its proper divisors (1854737169).

5561997807 is a wasteful number, since it uses less digits than its factorization.

5561997807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184477.

The product of its (nonzero) digits is 4762800, while the sum is 57.

The square root of 5561997807 is about 74578.8026653687. The cubic root of 5561997807 is about 1771.7819422263.

The spelling of 5561997807 in words is "five billion, five hundred sixty-one million, nine hundred ninety-seven thousand, eight hundred seven".