15421043736 has 160 divisors (see below), whose sum is σ = 49517614080. Its totient is φ = 4392273600.

The previous prime is 15421043719. The next prime is 15421043761. The reversal of 15421043736 is 63734012451.

15421043736 is a `hidden beast` number, since 1 + 5 + 4 + 210 + 437 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 15421043736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1496281 + ... + 1506551.

It is an arithmetic number, because the mean of its divisors is an integer number (309485088).

Almost surely, 2^15421043736 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 15421043736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24758807040).

15421043736 is an abundant number, since it is smaller than the sum of its proper divisors (34096570344).

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

15421043736 is a wasteful number, since it uses less digits than its factorization.

15421043736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10627 (or 10614 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 15421043736 in words is "fifteen billion, four hundred twenty-one million, forty-three thousand, seven hundred thirty-six".