15780934943 has 16 divisors (see below), whose sum is σ = 16098171936. Its totient is φ = 15466775040.

The previous prime is 15780934889. The next prime is 15780934987. The reversal of 15780934943 is 34943908751.

It is a cyclic number.

It is not a de Polignac number, because 15780934943 - 2¹⁰ = 15780933919 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15780937943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9522971 + ... + 9524627.

It is an arithmetic number, because the mean of its divisors is an integer number (1006135746).

Almost surely, 2^15780934943 is an apocalyptic number.

15780934943 is a deficient number, since it is larger than the sum of its proper divisors (317236993).

15780934943 is a wasteful number, since it uses less digits than its factorization.

15780934943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 15780934943 in words is "fifteen billion, seven hundred eighty million, nine hundred thirty-four thousand, nine hundred forty-three".