671155517563 has 8 divisors (see below), whose sum is σ = 685966417920. Its totient is φ = 656366742120.

The previous prime is 671155517551. The next prime is 671155517587. The reversal of 671155517563 is 365715551176.

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

It is a cyclic number.

It is not a de Polignac number, because 671155517563 - 2⁵ = 671155517531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671155517563.

It is not an unprimeable number, because it can be changed into a prime (671155517363) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5469883 + ... + 5591236.

It is an arithmetic number, because the mean of its divisors is an integer number (85745802240).

Almost surely, 2^671155517563 is an apocalyptic number.

671155517563 is a deficient number, since it is larger than the sum of its proper divisors (14810900357).

671155517563 is a wasteful number, since it uses less digits than its factorization.

671155517563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062457.

The product of its digits is 3307500, while the sum is 52.

The spelling of 671155517563 in words is "six hundred seventy-one billion, one hundred fifty-five million, five hundred seventeen thousand, five hundred sixty-three".