2161603503342 has 24 divisors (see below), whose sum is σ = 4688008154544. Its totient is φ = 719836978464.

The previous prime is 2161603503287. The next prime is 2161603503373. The reversal of 2161603503342 is 2433053061612.

2161603503342 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 603 + 5 + 0 + 3 + 3 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2161603503297 and 2161603503306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58107778 + ... + 58144965.

It is an arithmetic number, because the mean of its divisors is an integer number (195333673106).

Almost surely, 2^{2161603503342} is an apocalyptic number.

2161603503342 is an abundant number, since it is smaller than the sum of its proper divisors (2526404651202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161603503342 is a wasteful number, since it uses less digits than its factorization.

2161603503342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116253784 (or 116253781 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 2161603503342 its reverse (2433053061612), we get a palindrome (4594656564954).

The spelling of 2161603503342 in words is "two trillion, one hundred sixty-one billion, six hundred three million, five hundred three thousand, three hundred forty-two".