2145146441161 has 4 divisors (see below), whose sum is σ = 2180312776324. Its totient is φ = 2109980106000.

The previous prime is 2145146441143. The next prime is 2145146441201. The reversal of 2145146441161 is 1611446415412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 672457401225 + 1472689039936 = 820035^2 + 1213544^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145146441161 - 2³¹ = 2142998957513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145146441461) 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, 17583167490 + ... + 17583167611.

It is an arithmetic number, because the mean of its divisors is an integer number (545078194081).

Almost surely, 2^{2145146441161} is an apocalyptic number.

It is an amenable number.

2145146441161 is a deficient number, since it is larger than the sum of its proper divisors (35166335163).

2145146441161 is an equidigital number, since it uses as much as digits as its factorization.

2145146441161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35166335162.

The product of its digits is 92160, while the sum is 40.

The spelling of 2145146441161 in words is "two trillion, one hundred forty-five billion, one hundred forty-six million, four hundred forty-one thousand, one hundred sixty-one".