20125599456617 has 2 divisors, whose sum is σ = 20125599456618. Its totient is φ = 20125599456616.

The previous prime is 20125599456577. The next prime is 20125599456649. The reversal of 20125599456617 is 71665499552102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19602897930256 + 522701526361 = 4427516^2 + 722981^2 .

It is a cyclic number.

It is not a de Polignac number, because 20125599456617 - 2¹⁶ = 20125599391081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20125599456617.

It is not a weakly prime, because it can be changed into another prime (20125599356617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062799728308 + 10062799728309.

It is an arithmetic number, because the mean of its divisors is an integer number (10062799728309).

Almost surely, 2^{20125599456617} is an apocalyptic number.

It is an amenable number.

20125599456617 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125599456617 is an equidigital number, since it uses as much as digits as its factorization.

20125599456617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824000, while the sum is 62.

The spelling of 20125599456617 in words is "twenty trillion, one hundred twenty-five billion, five hundred ninety-nine million, four hundred fifty-six thousand, six hundred seventeen".