5561160981 has 16 divisors (see below), whose sum is σ = 7523808768. Its totient is φ = 3653039600.

The previous prime is 5561160973. The next prime is 5561160991. The reversal of 5561160981 is 1890611655.

It is a cyclic number.

It is not a de Polignac number, because 5561160981 - 2³ = 5561160973 is a prime.

It is a super-2 number, since 2×5561160981² = 61853022913193764722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561160971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399346 + ... + 413036.

It is an arithmetic number, because the mean of its divisors is an integer number (470238048).

Almost surely, 2^5561160981 is an apocalyptic number.

It is an amenable number.

5561160981 is a deficient number, since it is larger than the sum of its proper divisors (1962647787).

5561160981 is a wasteful number, since it uses less digits than its factorization.

5561160981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 5561160981 is about 74573.1921068154. The cubic root of 5561160981 is about 1771.6930804174.

The spelling of 5561160981 in words is "five billion, five hundred sixty-one million, one hundred sixty thousand, nine hundred eighty-one".