2161377703603 has 4 divisors (see below), whose sum is σ = 2161385482608. Its totient is φ = 2161369924600.

The previous prime is 2161377703601. The next prime is 2161377703609. The reversal of 2161377703603 is 3063077731612.

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

It is a cyclic number.

It is not a de Polignac number, because 2161377703603 - 2¹ = 2161377703601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161377703601) 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, 3456676 + ... + 4033777.

It is an arithmetic number, because the mean of its divisors is an integer number (540346370652).

Almost surely, 2^{2161377703603} is an apocalyptic number.

2161377703603 is a deficient number, since it is larger than the sum of its proper divisors (7779005).

2161377703603 is an equidigital number, since it uses as much as digits as its factorization.

2161377703603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7779004.

The product of its (nonzero) digits is 666792, while the sum is 46.

The spelling of 2161377703603 in words is "two trillion, one hundred sixty-one billion, three hundred seventy-seven million, seven hundred three thousand, six hundred three".