1538529516 has 18 divisors (see below), whose sum is σ = 3889060812. Its totient is φ = 512843160.

The previous prime is 1538529511. The next prime is 1538529521. The reversal of 1538529516 is 6159258351.

1538529516 is a `hidden beast` number, since 1 + 53 + 85 + 2 + 9 + 516 = 666.

1538529516 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1538529511) and next prime (1538529521).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1538529511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21368430 + ... + 21368501.

It is an arithmetic number, because the mean of its divisors is an integer number (216058934).

Almost surely, 2^1538529516 is an apocalyptic number.

It is an amenable number.

1538529516 is an abundant number, since it is smaller than the sum of its proper divisors (2350531296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1538529516 is a wasteful number, since it uses less digits than its factorization.

1538529516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42736941 (or 42736936 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 1538529516 is about 39224.0935650526. The cubic root of 1538529516 is about 1154.4326757867.

The spelling of 1538529516 in words is "one billion, five hundred thirty-eight million, five hundred twenty-nine thousand, five hundred sixteen".