1539638016 has 216 divisors, whose sum is σ = 4815042624. Its totient is φ = 435456000.

The previous prime is 1539637999. The next prime is 1539638017. The reversal of 1539638016 is 6108369351.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1539638017) 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 23 ways as a sum of consecutive naturals, for example, 6133891 + ... + 6134141.

It is an arithmetic number, because the mean of its divisors is an integer number (22291864).

Almost surely, 2^1539638016 is an apocalyptic number.

1539638016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1539638016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407521312).

1539638016 is an abundant number, since it is smaller than the sum of its proper divisors (3275404608).

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

1539638016 is a wasteful number, since it uses less digits than its factorization.

1539638016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1539638016 is about 39238.2213664177. The cubic root of 1539638016 is about 1154.7098628442.

The spelling of 1539638016 in words is "one billion, five hundred thirty-nine million, six hundred thirty-eight thousand, sixteen".