15780032123 has 2 divisors, whose sum is σ = 15780032124. Its totient is φ = 15780032122.

The previous prime is 15780032069. The next prime is 15780032137. The reversal of 15780032123 is 32123008751.

It is a strong prime.

It is an emirp because it is prime and its reverse (32123008751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15780032123 - 2¹² = 15780028027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15780032123.

It is not a weakly prime, because it can be changed into another prime (15780032183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7890016061 + 7890016062.

It is an arithmetic number, because the mean of its divisors is an integer number (7890016062).

Almost surely, 2^15780032123 is an apocalyptic number.

15780032123 is a deficient number, since it is larger than the sum of its proper divisors (1).

15780032123 is an equidigital number, since it uses as much as digits as its factorization.

15780032123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 15780032123 in words is "fifteen billion, seven hundred eighty million, thirty-two thousand, one hundred twenty-three".