135816124993 has 2 divisors, whose sum is σ = 135816124994. Its totient is φ = 135816124992.

The previous prime is 135816124987. The next prime is 135816125017. The reversal of 135816124993 is 399421618531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118520455824 + 17295669169 = 344268^2 + 131513^2 .

It is a cyclic number.

It is not a de Polignac number, because 135816124993 - 2¹³ = 135816116801 is a prime.

It is a super-2 number, since 2×135816124993² (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 135816124993.

It is not a weakly prime, because it can be changed into another prime (135816124943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67908062496 + 67908062497.

It is an arithmetic number, because the mean of its divisors is an integer number (67908062497).

Almost surely, 2^135816124993 is an apocalyptic number.

It is an amenable number.

135816124993 is a deficient number, since it is larger than the sum of its proper divisors (1).

135816124993 is an equidigital number, since it uses as much as digits as its factorization.

135816124993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The spelling of 135816124993 in words is "one hundred thirty-five billion, eight hundred sixteen million, one hundred twenty-four thousand, nine hundred ninety-three".