16671155557 has 8 divisors (see below), whose sum is σ = 19709740800. Its totient is φ = 13796818224.

The previous prime is 16671155533. The next prime is 16671155597. The reversal of 16671155557 is 75555117661.

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

It is not a de Polignac number, because 16671155557 - 2⁷ = 16671155429 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 16671155557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671155597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41061757 + ... + 41062162.

It is an arithmetic number, because the mean of its divisors is an integer number (2463717600).

Almost surely, 2^16671155557 is an apocalyptic number.

It is an amenable number.

16671155557 is a deficient number, since it is larger than the sum of its proper divisors (3038585243).

16671155557 is an equidigital number, since it uses as much as digits as its factorization.

16671155557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82123955.

The product of its digits is 1102500, while the sum is 49.

The spelling of 16671155557 in words is "sixteen billion, six hundred seventy-one million, one hundred fifty-five thousand, five hundred fifty-seven".