8538455621015 has 4 divisors (see below), whose sum is σ = 10246146745224. Its totient is φ = 6830764496808.

The previous prime is 8538455620963. The next prime is 8538455621077. The reversal of 8538455621015 is 5101265548358.

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

It is a cyclic number.

It is not a de Polignac number, because 8538455621015 - 2²⁸ = 8538187185559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853845562097 + ... + 853845562106.

It is an arithmetic number, because the mean of its divisors is an integer number (2561536686306).

Almost surely, 2^{8538455621015} is an apocalyptic number.

8538455621015 is a deficient number, since it is larger than the sum of its proper divisors (1707691124209).

8538455621015 is a wasteful number, since it uses less digits than its factorization.

8538455621015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707691124208.

The product of its (nonzero) digits is 5760000, while the sum is 53.

The spelling of 8538455621015 in words is "eight trillion, five hundred thirty-eight billion, four hundred fifty-five million, six hundred twenty-one thousand, fifteen".