125366401577 has 2 divisors, whose sum is σ = 125366401578. Its totient is φ = 125366401576.

The previous prime is 125366401549. The next prime is 125366401583. The reversal of 125366401577 is 775104663521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119096770816 + 6269630761 = 345104^2 + 79181^2 .

It is an emirp because it is prime and its reverse (775104663521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125366401577 - 2¹⁰ = 125366400553 is a prime.

It is not a weakly prime, because it can be changed into another prime (125366401177) 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, 62683200788 + 62683200789.

It is an arithmetic number, because the mean of its divisors is an integer number (62683200789).

Almost surely, 2^125366401577 is an apocalyptic number.

It is an amenable number.

125366401577 is a deficient number, since it is larger than the sum of its proper divisors (1).

125366401577 is an equidigital number, since it uses as much as digits as its factorization.

125366401577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 125366401577 in words is "one hundred twenty-five billion, three hundred sixty-six million, four hundred one thousand, five hundred seventy-seven".