162143233261 has 2 divisors, whose sum is σ = 162143233262. Its totient is φ = 162143233260.

The previous prime is 162143233243. The next prime is 162143233303. The reversal of 162143233261 is 162332341261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153874968361 + 8268264900 = 392269^2 + 90930^2 .

It is a cyclic number.

It is not a de Polignac number, because 162143233261 - 2¹¹ = 162143231213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162143233061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81071616630 + 81071616631.

It is an arithmetic number, because the mean of its divisors is an integer number (81071616631).

Almost surely, 2^162143233261 is an apocalyptic number.

It is an amenable number.

162143233261 is a deficient number, since it is larger than the sum of its proper divisors (1).

162143233261 is an equidigital number, since it uses as much as digits as its factorization.

162143233261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The spelling of 162143233261 in words is "one hundred sixty-two billion, one hundred forty-three million, two hundred thirty-three thousand, two hundred sixty-one".