55321765567478 has 4 divisors (see below), whose sum is σ = 82982648351220. Its totient is φ = 27660882783738.

The previous prime is 55321765567459. The next prime is 55321765567501. The reversal of 55321765567478 is 87476556712355.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13830441391868 + ... + 13830441391871.

It is an arithmetic number, because the mean of its divisors is an integer number (20745662087805).

Almost surely, 2^{55321765567478} is an apocalyptic number.

55321765567478 is a deficient number, since it is larger than the sum of its proper divisors (27660882783742).

55321765567478 is a wasteful number, since it uses less digits than its factorization.

55321765567478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27660882783741.

The product of its digits is 1481760000, while the sum is 71.

The spelling of 55321765567478 in words is "fifty-five trillion, three hundred twenty-one billion, seven hundred sixty-five million, five hundred sixty-seven thousand, four hundred seventy-eight".