1561142163141 has 24 divisors (see below), whose sum is σ = 2468736017280. Its totient is φ = 942779678400.

The previous prime is 1561142163103. The next prime is 1561142163173. The reversal of 1561142163141 is 1413612411651.

1561142163141 is a `hidden beast` number, since 1 + 5 + 6 + 1 + 14 + 2 + 1 + 631 + 4 + 1 = 666.

It is not a de Polignac number, because 1561142163141 - 2³⁴ = 1543962293957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1561142163096 and 1561142163105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561142163181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28031101 + ... + 28086738.

It is an arithmetic number, because the mean of its divisors is an integer number (102864000720).

Almost surely, 2^{1561142163141} is an apocalyptic number.

1561142163141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1561142163141 is a deficient number, since it is larger than the sum of its proper divisors (907593854139).

1561142163141 is a wasteful number, since it uses less digits than its factorization.

1561142163141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56118137 (or 56118134 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

Adding to 1561142163141 its reverse (1413612411651), we get a palindrome (2974754574792).

The spelling of 1561142163141 in words is "one trillion, five hundred sixty-one billion, one hundred forty-two million, one hundred sixty-three thousand, one hundred forty-one".