55550055005551 has 4 divisors (see below), whose sum is σ = 55614423552192. Its totient is φ = 55485686458912.

The previous prime is 55550055005537. The next prime is 55550055005591. The reversal of 55550055005551 is 15550055005555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55550055005551 - 2¹⁹ = 55550054481263 is a prime.

It is a super-2 number, since 2×55550055005551² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550055005521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32184272026 + ... + 32184273751.

It is an arithmetic number, because the mean of its divisors is an integer number (13903605888048).

Almost surely, 2^{55550055005551} is an apocalyptic number.

55550055005551 is a deficient number, since it is larger than the sum of its proper divisors (64368546641).

55550055005551 is an equidigital number, since it uses as much as digits as its factorization.

55550055005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64368546640.

The product of its (nonzero) digits is 1953125, while the sum is 46.

The spelling of 55550055005551 in words is "fifty-five trillion, five hundred fifty billion, fifty-five million, five thousand, five hundred fifty-one".