161525154211 has 2 divisors, whose sum is σ = 161525154212. Its totient is φ = 161525154210.

The previous prime is 161525154209. The next prime is 161525154221. The reversal of 161525154211 is 112451525161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161525154211 - 2¹ = 161525154209 is a prime.

Together with 161525154209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161525154221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80762577105 + 80762577106.

It is an arithmetic number, because the mean of its divisors is an integer number (80762577106).

Almost surely, 2^161525154211 is an apocalyptic number.

161525154211 is a deficient number, since it is larger than the sum of its proper divisors (1).

161525154211 is an equidigital number, since it uses as much as digits as its factorization.

161525154211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 34.

Adding to 161525154211 its reverse (112451525161), we get a palindrome (273976679372).

The spelling of 161525154211 in words is "one hundred sixty-one billion, five hundred twenty-five million, one hundred fifty-four thousand, two hundred eleven".