84155111517583 has 4 divisors (see below), whose sum is σ = 84162148498480. Its totient is φ = 84148074536688.

The previous prime is 84155111517571. The next prime is 84155111517661. The reversal of 84155111517583 is 38571511155148.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84155111517583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84155111517563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518472510 + ... + 3518496427.

It is an arithmetic number, because the mean of its divisors is an integer number (21040537124620).

Almost surely, 2^{84155111517583} is an apocalyptic number.

84155111517583 is a deficient number, since it is larger than the sum of its proper divisors (7036980897).

84155111517583 is a wasteful number, since it uses less digits than its factorization.

84155111517583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036980896.

The product of its digits is 3360000, while the sum is 55.

The spelling of 84155111517583 in words is "eighty-four trillion, one hundred fifty-five billion, one hundred eleven million, five hundred seventeen thousand, five hundred eighty-three".