1538396161 has 4 divisors (see below), whose sum is σ = 1619364400. Its totient is φ = 1457427924.

The previous prime is 1538396159. The next prime is 1538396183. The reversal of 1538396161 is 1616938351.

It is a happy number.

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 not a de Polignac number, because 1538396161 - 2¹ = 1538396159 is a prime.

It is a super-3 number, since 3×1538396161³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538396131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40484091 + ... + 40484128.

It is an arithmetic number, because the mean of its divisors is an integer number (404841100).

Almost surely, 2^1538396161 is an apocalyptic number.

It is an amenable number.

1538396161 is a deficient number, since it is larger than the sum of its proper divisors (80968239).

1538396161 is an equidigital number, since it uses as much as digits as its factorization.

1538396161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80968238.

The product of its digits is 116640, while the sum is 43.

The square root of 1538396161 is about 39222.3936164024. The cubic root of 1538396161 is about 1154.3993206000.

It can be divided in two parts, 153839 and 6161, that added together give a 4-th power (160000 = 20⁴).

The spelling of 1538396161 in words is "one billion, five hundred thirty-eight million, three hundred ninety-six thousand, one hundred sixty-one".