15772115123 has 2 divisors, whose sum is σ = 15772115124. Its totient is φ = 15772115122.

The previous prime is 15772115113. The next prime is 15772115147. The reversal of 15772115123 is 32151127751.

15772115123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (32151127751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15772115123 - 2¹⁴ = 15772098739 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (15772115113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7886057561 + 7886057562.

It is an arithmetic number, because the mean of its divisors is an integer number (7886057562).

Almost surely, 2^15772115123 is an apocalyptic number.

15772115123 is a deficient number, since it is larger than the sum of its proper divisors (1).

15772115123 is an equidigital number, since it uses as much as digits as its factorization.

15772115123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 35.

The spelling of 15772115123 in words is "fifteen billion, seven hundred seventy-two million, one hundred fifteen thousand, one hundred twenty-three".