15921250048 has 72 divisors (see below), whose sum is σ = 34923334320. Its totient is φ = 7183933440.

The previous prime is 15921250027. The next prime is 15921250157. The reversal of 15921250048 is 84005212951.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 15921249989 and 15921250016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365158 + ... + 406426.

It is an arithmetic number, because the mean of its divisors is an integer number (485046310).

Almost surely, 2^15921250048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15921250048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17461667160).

15921250048 is an abundant number, since it is smaller than the sum of its proper divisors (19002084272).

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

15921250048 is a wasteful number, since it uses less digits than its factorization.

15921250048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41433 (or 41419 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

Adding to 15921250048 its reverse (84005212951), we get a palindrome (99926462999).

The spelling of 15921250048 in words is "fifteen billion, nine hundred twenty-one million, two hundred fifty thousand, forty-eight".