55381554245405 has 12 divisors (see below), whose sum is σ = 70139741279292. Its totient is φ = 41973388479360.

The previous prime is 55381554245359. The next prime is 55381554245411. The reversal of 55381554245405 is 50454245518355.

It can be written as a sum of positive squares in 2 ways, for example, as 35827275676921 + 19554278568484 = 5985589^2 + 4422022^2 .

It is not a de Polignac number, because 55381554245405 - 2⁶ = 55381554245341 is a prime.

It is a super-2 number, since 2×55381554245405² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15341148956 + ... + 15341152565.

It is an arithmetic number, because the mean of its divisors is an integer number (5844978439941).

Almost surely, 2^{55381554245405} is an apocalyptic number.

It is an amenable number.

55381554245405 is a deficient number, since it is larger than the sum of its proper divisors (14758187033887).

55381554245405 is a wasteful number, since it uses less digits than its factorization.

55381554245405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30682301564 (or 30682301545 counting only the distinct ones).

The product of its (nonzero) digits is 48000000, while the sum is 56.

The spelling of 55381554245405 in words is "fifty-five trillion, three hundred eighty-one billion, five hundred fifty-four million, two hundred forty-five thousand, four hundred five".