5651561109 has 8 divisors (see below), whose sum is σ = 7535765952. Its totient is φ = 3767531840.

The previous prime is 5651561063. The next prime is 5651561117. The reversal of 5651561109 is 9011651565.

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 5651561109 - 2²¹ = 5649463957 is a prime.

It is a super-2 number, since 2×5651561109² = 63880285937522619762, 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 (5651561119) 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, 86872 + ... + 137294.

It is an arithmetic number, because the mean of its divisors is an integer number (941970744).

Almost surely, 2^5651561109 is an apocalyptic number.

It is an amenable number.

5651561109 is a deficient number, since it is larger than the sum of its proper divisors (1884204843).

5651561109 is a wasteful number, since it uses less digits than its factorization.

5651561109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87787.

The product of its (nonzero) digits is 40500, while the sum is 39.

The square root of 5651561109 is about 75176.8655172587. The cubic root of 5651561109 is about 1781.2415179258.

The spelling of 5651561109 in words is "five billion, six hundred fifty-one million, five hundred sixty-one thousand, one hundred nine".