1163141262161 has 4 divisors (see below), whose sum is σ = 1163146882800. Its totient is φ = 1163135641524.

The previous prime is 1163141262149. The next prime is 1163141262167. The reversal of 1163141262161 is 1612621413611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163141262161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1163141262167) 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, 2487551 + ... + 2917908.

It is an arithmetic number, because the mean of its divisors is an integer number (290786720700).

Almost surely, 2^{1163141262161} is an apocalyptic number.

It is an amenable number.

1163141262161 is a deficient number, since it is larger than the sum of its proper divisors (5620639).

1163141262161 is an equidigital number, since it uses as much as digits as its factorization.

1163141262161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620638.

The product of its digits is 10368, while the sum is 35.

Adding to 1163141262161 its reverse (1612621413611), we get a palindrome (2775762675772).

The spelling of 1163141262161 in words is "one trillion, one hundred sixty-three billion, one hundred forty-one million, two hundred sixty-two thousand, one hundred sixty-one".