15728997943 has 4 divisors (see below), whose sum is σ = 16556839960. Its totient is φ = 14901155928.

The previous prime is 15728997923. The next prime is 15728997959. The reversal of 15728997943 is 34979982751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15728997943 - 2²⁹ = 15192127031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15728997923) 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 3 ways as a sum of consecutive naturals, for example, 413920980 + ... + 413921017.

It is an arithmetic number, because the mean of its divisors is an integer number (4139209990).

Almost surely, 2^15728997943 is an apocalyptic number.

15728997943 is a deficient number, since it is larger than the sum of its proper divisors (827842017).

15728997943 is an equidigital number, since it uses as much as digits as its factorization.

15728997943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827842016.

The product of its digits is 34292160, while the sum is 64.

The spelling of 15728997943 in words is "fifteen billion, seven hundred twenty-eight million, nine hundred ninety-seven thousand, nine hundred forty-three".