55495978117 has 8 divisors (see below), whose sum is σ = 58762886616. Its totient is φ = 52229340672.

The previous prime is 55495978091. The next prime is 55495978129. The reversal of 55495978117 is 71187959455.

It can be written as a sum of positive squares in 4 ways, for example, as 23594803236 + 31901174881 = 153606^2 + 178609^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55495978117 - 2¹¹ = 55495976069 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 (55495978177) 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 7 ways as a sum of consecutive naturals, for example, 480643 + ... + 584815.

It is an arithmetic number, because the mean of its divisors is an integer number (7345360827).

Almost surely, 2^55495978117 is an apocalyptic number.

It is an amenable number.

55495978117 is a deficient number, since it is larger than the sum of its proper divisors (3266908499).

55495978117 is a wasteful number, since it uses less digits than its factorization.

55495978117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135527.

The product of its digits is 15876000, while the sum is 61.

The spelling of 55495978117 in words is "fifty-five billion, four hundred ninety-five million, nine hundred seventy-eight thousand, one hundred seventeen".