2161603355001 has 8 divisors (see below), whose sum is σ = 2883200944704. Its totient is φ = 1440537334320.

The previous prime is 2161603354997. The next prime is 2161603355003. The reversal of 2161603355001 is 1005533061612.

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

It is not a de Polignac number, because 2161603355001 - 2² = 2161603354997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161603355003) 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, 132882766 + ... + 132899031.

It is an arithmetic number, because the mean of its divisors is an integer number (360400118088).

Almost surely, 2^{2161603355001} is an apocalyptic number.

It is an amenable number.

2161603355001 is a deficient number, since it is larger than the sum of its proper divisors (721597589703).

2161603355001 is a wasteful number, since it uses less digits than its factorization.

2161603355001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265784511.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 2161603355001 in words is "two trillion, one hundred sixty-one billion, six hundred three million, three hundred fifty-five thousand, one".