55545055661539 has 4 divisors (see below), whose sum is σ = 55545453993456. Its totient is φ = 55544657329624.

The previous prime is 55545055661531. The next prime is 55545055661551. The reversal of 55545055661539 is 93516655054555.

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 55545055661539 - 2³ = 55545055661531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55545055661531) 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, 198956719 + ... + 199235704.

It is an arithmetic number, because the mean of its divisors is an integer number (13886363498364).

Almost surely, 2^{55545055661539} is an apocalyptic number.

55545055661539 is a deficient number, since it is larger than the sum of its proper divisors (398331917).

55545055661539 is a wasteful number, since it uses less digits than its factorization.

55545055661539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398331916.

The product of its (nonzero) digits is 303750000, while the sum is 64.

The spelling of 55545055661539 in words is "fifty-five trillion, five hundred forty-five billion, fifty-five million, six hundred sixty-one thousand, five hundred thirty-nine".