5501155561 has 16 divisors (see below), whose sum is σ = 6326673408. Its totient is φ = 4736739600.

The previous prime is 5501155559. The next prime is 5501155567. The reversal of 5501155561 is 1655511055.

It is a cyclic number.

It is not a de Polignac number, because 5501155561 - 2¹ = 5501155559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5501155567) 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 15 ways as a sum of consecutive naturals, for example, 155595 + ... + 187648.

It is an arithmetic number, because the mean of its divisors is an integer number (395417088).

Almost surely, 2^5501155561 is an apocalyptic number.

It is an amenable number.

5501155561 is a deficient number, since it is larger than the sum of its proper divisors (825517847).

5501155561 is a wasteful number, since it uses less digits than its factorization.

5501155561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343332.

The product of its (nonzero) digits is 18750, while the sum is 34.

The square root of 5501155561 is about 74169.7752524571. The cubic root of 5501155561 is about 1765.2977812139.

The spelling of 5501155561 in words is "five billion, five hundred one million, one hundred fifty-five thousand, five hundred sixty-one".