55611005554991 has 4 divisors (see below), whose sum is σ = 55712671013592. Its totient is φ = 55509340096392.

The previous prime is 55611005554927. The next prime is 55611005555051. The reversal of 55611005554991 is 19945550011655.

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 55611005554991 - 2⁶ = 55611005554927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55611005554901) 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, 50832728480 + ... + 50832729573.

It is an arithmetic number, because the mean of its divisors is an integer number (13928167753398).

Almost surely, 2^{55611005554991} is an apocalyptic number.

55611005554991 is a deficient number, since it is larger than the sum of its proper divisors (101665458601).

55611005554991 is a wasteful number, since it uses less digits than its factorization.

55611005554991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101665458600.

The product of its (nonzero) digits is 6075000, while the sum is 56.

The spelling of 55611005554991 in words is "fifty-five trillion, six hundred eleven billion, five million, five hundred fifty-four thousand, nine hundred ninety-one".