671155517539 has 16 divisors (see below), whose sum is σ = 723972412800. Its totient is φ = 618509324160.

The previous prime is 671155517531. The next prime is 671155517551. The reversal of 671155517539 is 935715551176.

It is not a de Polignac number, because 671155517539 - 2³ = 671155517531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671155517539.

It is not an unprimeable number, because it can be changed into a prime (671155517531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23067469 + ... + 23096545.

It is an arithmetic number, because the mean of its divisors is an integer number (45248275800).

Almost surely, 2^671155517539 is an apocalyptic number.

671155517539 is a deficient number, since it is larger than the sum of its proper divisors (52816895261).

671155517539 is a wasteful number, since it uses less digits than its factorization.

671155517539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31950.

The product of its digits is 4961250, while the sum is 55.

The spelling of 671155517539 in words is "six hundred seventy-one billion, one hundred fifty-five million, five hundred seventeen thousand, five hundred thirty-nine".