125256063161 has 2 divisors, whose sum is σ = 125256063162. Its totient is φ = 125256063160.

The previous prime is 125256063137. The next prime is 125256063181. The reversal of 125256063161 is 161360652521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118374531136 + 6881532025 = 344056^2 + 82955^2 .

It is an emirp because it is prime and its reverse (161360652521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125256063161 - 2¹⁴ = 125256046777 is a prime.

It is not a weakly prime, because it can be changed into another prime (125256063181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62628031580 + 62628031581.

It is an arithmetic number, because the mean of its divisors is an integer number (62628031581).

Almost surely, 2^125256063161 is an apocalyptic number.

It is an amenable number.

125256063161 is a deficient number, since it is larger than the sum of its proper divisors (1).

125256063161 is an equidigital number, since it uses as much as digits as its factorization.

125256063161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 125256063161 in words is "one hundred twenty-five billion, two hundred fifty-six million, sixty-three thousand, one hundred sixty-one".