16961141805855 has 32 divisors (see below), whose sum is σ = 29230664687616. Its totient is φ = 8348582680704.

The previous prime is 16961141805851. The next prime is 16961141805857. The reversal of 16961141805855 is 55850814116961.

It is a happy number.

It is not a de Polignac number, because 16961141805855 - 2² = 16961141805851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16961141805851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6829897 + ... + 8976066.

It is an arithmetic number, because the mean of its divisors is an integer number (913458271488).

Almost surely, 2^{16961141805855} is an apocalyptic number.

16961141805855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16961141805855 is a deficient number, since it is larger than the sum of its proper divisors (12269522881761).

16961141805855 is a wasteful number, since it uses less digits than its factorization.

16961141805855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811487.

The product of its (nonzero) digits is 10368000, while the sum is 60.

The spelling of 16961141805855 in words is "sixteen trillion, nine hundred sixty-one billion, one hundred forty-one million, eight hundred five thousand, eight hundred fifty-five".