15150721643772 has 192 divisors, whose sum is σ = 42323999606784. Its totient is φ = 4157184245760.

The previous prime is 15150721643713. The next prime is 15150721643779. The reversal of 15150721643772 is 27734612705151.

It is a super-2 number, since 2×15150721643772² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15150721643779) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 571776828 + ... + 571803324.

It is an arithmetic number, because the mean of its divisors is an integer number (220437497952).

Almost surely, 2^{15150721643772} is an apocalyptic number.

15150721643772 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 15150721643772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21161999803392).

15150721643772 is an abundant number, since it is smaller than the sum of its proper divisors (27173277963012).

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

15150721643772 is a wasteful number, since it uses less digits than its factorization.

15150721643772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32868 (or 32866 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 15150721643772 in words is "fifteen trillion, one hundred fifty billion, seven hundred twenty-one million, six hundred forty-three thousand, seven hundred seventy-two".