135286487681 has 2 divisors, whose sum is σ = 135286487682. Its totient is φ = 135286487680.

The previous prime is 135286487663. The next prime is 135286487771. The reversal of 135286487681 is 186784682531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87710153281 + 47576334400 = 296159^2 + 218120^2 .

It is a cyclic number.

It is not a de Polignac number, because 135286487681 - 2⁶ = 135286487617 is a prime.

It is a super-2 number, since 2×135286487681² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135286487681.

It is not a weakly prime, because it can be changed into another prime (135286417681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67643243840 + 67643243841.

It is an arithmetic number, because the mean of its divisors is an integer number (67643243841).

Almost surely, 2^135286487681 is an apocalyptic number.

It is an amenable number.

135286487681 is a deficient number, since it is larger than the sum of its proper divisors (1).

135286487681 is an equidigital number, since it uses as much as digits as its factorization.

135286487681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15482880, while the sum is 59.

The spelling of 135286487681 in words is "one hundred thirty-five billion, two hundred eighty-six million, four hundred eighty-seven thousand, six hundred eighty-one".