15266517481 has 2 divisors, whose sum is σ = 15266517482. Its totient is φ = 15266517480.

The previous prime is 15266517449. The next prime is 15266517491. The reversal of 15266517481 is 18471566251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14040117081 + 1226400400 = 118491^2 + 35020^2 .

It is an emirp because it is prime and its reverse (18471566251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15266517481 - 2⁵ = 15266517449 is a prime.

It is a super-2 number, since 2×15266517481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15266517401) 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 as a sum of consecutive naturals, namely, 7633258740 + 7633258741.

It is an arithmetic number, because the mean of its divisors is an integer number (7633258741).

Almost surely, 2^15266517481 is an apocalyptic number.

It is an amenable number.

15266517481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15266517481 is an equidigital number, since it uses as much as digits as its factorization.

15266517481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 46.

The spelling of 15266517481 in words is "fifteen billion, two hundred sixty-six million, five hundred seventeen thousand, four hundred eighty-one".