15721061912192 has 1024 divisors, whose sum is σ = 44694115200000. Its totient is φ = 5437389275136.

The previous prime is 15721061912177. The next prime is 15721061912207. The reversal of 15721061912192 is 29121916012751.

It is an interprime number because it is at equal distance from previous prime (15721061912177) and next prime (15721061912207).

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 9770702684 + ... + 9770704292.

It is an arithmetic number, because the mean of its divisors is an integer number (43646596875).

Almost surely, 2^{15721061912192} 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 15721061912192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22347057600000).

15721061912192 is an abundant number, since it is smaller than the sum of its proper divisors (28973053287808).

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

15721061912192 is a wasteful number, since it uses less digits than its factorization.

15721061912192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 47.

The spelling of 15721061912192 in words is "fifteen trillion, seven hundred twenty-one billion, sixty-one million, nine hundred twelve thousand, one hundred ninety-two".