15938209872 has 120 divisors (see below), whose sum is σ = 48070923264. Its totient is φ = 4900499712.

The previous prime is 15938209871. The next prime is 15938209879. The reversal of 15938209872 is 27890283951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15938209871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3859873 + ... + 3863999.

Almost surely, 2^15938209872 is an apocalyptic number.

15938209872 is a gapful number since it is divisible by the number (12) 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 15938209872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24035461632).

15938209872 is an abundant number, since it is smaller than the sum of its proper divisors (32132713392).

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

15938209872 is a wasteful number, since it uses less digits than its factorization.

15938209872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217 (or 6208 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 15938209872 in words is "fifteen billion, nine hundred thirty-eight million, two hundred nine thousand, eight hundred seventy-two".