124853391781 has 2 divisors, whose sum is σ = 124853391782. Its totient is φ = 124853391780.

The previous prime is 124853391743. The next prime is 124853391809. The reversal of 124853391781 is 187193358421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82814450625 + 42038941156 = 287775^2 + 205034^2 .

It is an emirp because it is prime and its reverse (187193358421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124853391781 - 2²⁹ = 124316520869 is a prime.

It is a super-2 number, since 2×124853391781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124853391581) 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, 62426695890 + 62426695891.

It is an arithmetic number, because the mean of its divisors is an integer number (62426695891).

Almost surely, 2^124853391781 is an apocalyptic number.

It is an amenable number.

124853391781 is a deficient number, since it is larger than the sum of its proper divisors (1).

124853391781 is an equidigital number, since it uses as much as digits as its factorization.

124853391781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The spelling of 124853391781 in words is "one hundred twenty-four billion, eight hundred fifty-three million, three hundred ninety-one thousand, seven hundred eighty-one".