125184551549 has 2 divisors, whose sum is σ = 125184551550. Its totient is φ = 125184551548.

The previous prime is 125184551537. The next prime is 125184551641. The reversal of 125184551549 is 945155481521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62943283225 + 62241268324 = 250885^2 + 249482^2 .

It is an emirp because it is prime and its reverse (945155481521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125184551549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125184551497 and 125184551506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125184551519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62592275774 + 62592275775.

It is an arithmetic number, because the mean of its divisors is an integer number (62592275775).

Almost surely, 2^125184551549 is an apocalyptic number.

It is an amenable number.

125184551549 is a deficient number, since it is larger than the sum of its proper divisors (1).

125184551549 is an equidigital number, since it uses as much as digits as its factorization.

125184551549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440000, while the sum is 50.

The spelling of 125184551549 in words is "one hundred twenty-five billion, one hundred eighty-four million, five hundred fifty-one thousand, five hundred forty-nine".