1215454541055 has 8 divisors (see below), whose sum is σ = 1944727265712. Its totient is φ = 648242421888.

The previous prime is 1215454541017. The next prime is 1215454541071. The reversal of 1215454541055 is 5501454545121.

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

It is not a de Polignac number, because 1215454541055 - 2¹⁰ = 1215454540031 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1215454540998 and 1215454541016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40515151354 + ... + 40515151383.

It is an arithmetic number, because the mean of its divisors is an integer number (243090908214).

Almost surely, 2^{1215454541055} is an apocalyptic number.

1215454541055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215454541055 is a deficient number, since it is larger than the sum of its proper divisors (729272724657).

1215454541055 is an equidigital number, since it uses as much as digits as its factorization.

1215454541055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81030302745.

The product of its (nonzero) digits is 400000, while the sum is 42.

The spelling of 1215454541055 in words is "one trillion, two hundred fifteen billion, four hundred fifty-four million, five hundred forty-one thousand, fifty-five".