1538546851 has 4 divisors (see below), whose sum is σ = 1538627400. Its totient is φ = 1538466304.

The previous prime is 1538546791. The next prime is 1538546861. The reversal of 1538546851 is 1586458351.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1586458351 = 47 ⋅33754433.

It is a cyclic number.

It is not a de Polignac number, because 1538546851 - 2¹⁵ = 1538514083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538546861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6435 + ... + 55843.

It is an arithmetic number, because the mean of its divisors is an integer number (384656850).

Almost surely, 2^1538546851 is an apocalyptic number.

1538546851 is a deficient number, since it is larger than the sum of its proper divisors (80549).

1538546851 is an equidigital number, since it uses as much as digits as its factorization.

1538546851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80548.

The product of its digits is 576000, while the sum is 46.

The square root of 1538546851 is about 39224.3145383065. The cubic root of 1538546851 is about 1154.4370115317.

The spelling of 1538546851 in words is "one billion, five hundred thirty-eight million, five hundred forty-six thousand, eight hundred fifty-one".