15286287715481 has 2 divisors, whose sum is σ = 15286287715482. Its totient is φ = 15286287715480.

The previous prime is 15286287715373. The next prime is 15286287715507. The reversal of 15286287715481 is 18451778268251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8299469574400 + 6986818141081 = 2880880^2 + 2643259^2 .

It is a cyclic number.

It is not a de Polignac number, because 15286287715481 - 2¹⁸ = 15286287453337 is a prime.

It is a super-2 number, since 2×15286287715481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15286287715081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7643143857740 + 7643143857741.

It is an arithmetic number, because the mean of its divisors is an integer number (7643143857741).

Almost surely, 2^{15286287715481} is an apocalyptic number.

It is an amenable number.

15286287715481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15286287715481 is an equidigital number, since it uses as much as digits as its factorization.

15286287715481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60211200, while the sum is 65.

The spelling of 15286287715481 in words is "fifteen trillion, two hundred eighty-six billion, two hundred eighty-seven million, seven hundred fifteen thousand, four hundred eighty-one".