55345520999 has 4 divisors (see below), whose sum is σ = 55382692080. Its totient is φ = 55308349920.

The previous prime is 55345520987. The next prime is 55345521001. The reversal of 55345520999 is 99902554355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99902554355 = 5 ⋅19980510871.

It is a cyclic number.

It is not a de Polignac number, because 55345520999 - 2¹² = 55345516903 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 (55345520929) 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 3 ways as a sum of consecutive naturals, for example, 18583307 + ... + 18586284.

It is an arithmetic number, because the mean of its divisors is an integer number (13845673020).

Almost surely, 2^55345520999 is an apocalyptic number.

55345520999 is a deficient number, since it is larger than the sum of its proper divisors (37171081).

55345520999 is a wasteful number, since it uses less digits than its factorization.

55345520999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37171080.

The product of its (nonzero) digits is 10935000, while the sum is 56.

The spelling of 55345520999 in words is "fifty-five billion, three hundred forty-five million, five hundred twenty thousand, nine hundred ninety-nine".