1538265413161 has 2 divisors, whose sum is σ = 1538265413162. Its totient is φ = 1538265413160.

The previous prime is 1538265413159. The next prime is 1538265413221. The reversal of 1538265413161 is 1613145628351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787512481561 + 750752931600 = 887419^2 + 866460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538265413161 - 2¹ = 1538265413159 is a prime.

It is a super-4 number, since 4×1538265413161⁴ (a number of 50 digits) contains 4444 as substring.

Together with 1538265413159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1538265413261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769132706580 + 769132706581.

It is an arithmetic number, because the mean of its divisors is an integer number (769132706581).

Almost surely, 2^{1538265413161} is an apocalyptic number.

It is an amenable number.

1538265413161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538265413161 is an equidigital number, since it uses as much as digits as its factorization.

1538265413161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 46.

The spelling of 1538265413161 in words is "one trillion, five hundred thirty-eight billion, two hundred sixty-five million, four hundred thirteen thousand, one hundred sixty-one".