5551659121 has 4 divisors (see below), whose sum is σ = 5562274672. Its totient is φ = 5541043572.

The previous prime is 5551659101. The next prime is 5551659133. The reversal of 5551659121 is 1219561555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5551659121 - 2¹⁹ = 5551134833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551659101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5306991 + ... + 5308036.

It is an arithmetic number, because the mean of its divisors is an integer number (1390568668).

Almost surely, 2^5551659121 is an apocalyptic number.

It is an amenable number.

5551659121 is a deficient number, since it is larger than the sum of its proper divisors (10615551).

5551659121 is a wasteful number, since it uses less digits than its factorization.

5551659121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615550.

The product of its digits is 67500, while the sum is 40.

The square root of 5551659121 is about 74509.4565877379. The cubic root of 5551659121 is about 1770.6834605087.

The spelling of 5551659121 in words is "five billion, five hundred fifty-one million, six hundred fifty-nine thousand, one hundred twenty-one".