15326975381 has 2 divisors, whose sum is σ = 15326975382. Its totient is φ = 15326975380.

The previous prime is 15326975291. The next prime is 15326975383. The reversal of 15326975381 is 18357962351.

15326975381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14225332900 + 1101642481 = 119270^2 + 33191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15326975381 is a prime.

It is a super-2 number, since 2×15326975381² (a number of 21 digits) contains 22 as substring.

Together with 15326975383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15326975383) 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, 7663487690 + 7663487691.

It is an arithmetic number, because the mean of its divisors is an integer number (7663487691).

Almost surely, 2^15326975381 is an apocalyptic number.

It is an amenable number.

15326975381 is a deficient number, since it is larger than the sum of its proper divisors (1).

15326975381 is an equidigital number, since it uses as much as digits as its factorization.

15326975381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 50.

The spelling of 15326975381 in words is "fifteen billion, three hundred twenty-six million, nine hundred seventy-five thousand, three hundred eighty-one".