15639003136 has 45 divisors (see below), whose sum is σ = 31309097869. Its totient is φ = 7811497984.

The previous prime is 15639003097. The next prime is 15639003169. The reversal of 15639003136 is 63130093651.

The square root of 15639003136 is 125056.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14631321600 + 1007681536 = 120960^2 + 31744^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15639003095 and 15639003104.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16006680 + ... + 16007656.

Almost surely, 2^15639003136 is an apocalyptic number.

15639003136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15639003136 is the 125056-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15639003136

15639003136 is an abundant number, since it is smaller than the sum of its proper divisors (15670094733).

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

15639003136 is an frugal number, since it uses more digits than its factorization.

15639003136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 37.

Adding to 15639003136 its reverse (63130093651), we get a palindrome (78769096787).

The spelling of 15639003136 in words is "fifteen billion, six hundred thirty-nine million, three thousand, one hundred thirty-six".