16961842897201 has 4 divisors (see below), whose sum is σ = 17117456134900. Its totient is φ = 16806229659504.

The previous prime is 16961842897187. The next prime is 16961842897211. The reversal of 16961842897201 is 10279824816961.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10442624565025 + 6519218332176 = 3231505^2 + 2553276^2 .

It is a cyclic number.

It is not a de Polignac number, because 16961842897201 - 2¹³ = 16961842889009 is a prime.

It is a super-2 number, since 2×16961842897201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16961842897211) 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, 77806618686 + ... + 77806618903.

It is an arithmetic number, because the mean of its divisors is an integer number (4279364033725).

Almost surely, 2^{16961842897201} is an apocalyptic number.

It is an amenable number.

16961842897201 is a deficient number, since it is larger than the sum of its proper divisors (155613237699).

16961842897201 is a wasteful number, since it uses less digits than its factorization.

16961842897201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155613237698.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 16961842897201 in words is "sixteen trillion, nine hundred sixty-one billion, eight hundred forty-two million, eight hundred ninety-seven thousand, two hundred one".