5533378861555 has 4 divisors (see below), whose sum is σ = 6640054633872. Its totient is φ = 4426703089240.

The previous prime is 5533378861499. The next prime is 5533378861561. The reversal of 5533378861555 is 5551688733355.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5533378861555 - 2¹¹ = 5533378859507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553337886151 + ... + 553337886160.

It is an arithmetic number, because the mean of its divisors is an integer number (1660013658468).

Almost surely, 2^{5533378861555} is an apocalyptic number.

5533378861555 is a deficient number, since it is larger than the sum of its proper divisors (1106675772317).

5533378861555 is a wasteful number, since it uses less digits than its factorization.

5533378861555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106675772316.

The product of its digits is 226800000, while the sum is 64.

The spelling of 5533378861555 in words is "five trillion, five hundred thirty-three billion, three hundred seventy-eight million, eight hundred sixty-one thousand, five hundred fifty-five".