25478556170953 has 2 divisors, whose sum is σ = 25478556170954. Its totient is φ = 25478556170952.

The previous prime is 25478556170927. The next prime is 25478556170983. The reversal of 25478556170953 is 35907165587452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25351708362304 + 126847808649 = 5035048^2 + 356157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25478556170953 is a prime.

It is not a weakly prime, because it can be changed into another prime (25478556170983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739278085476 + 12739278085477.

It is an arithmetic number, because the mean of its divisors is an integer number (12739278085477).

It is a 1-persistent number, because it is pandigital, but 2⋅25478556170953 = 50957112341906 is not.

Almost surely, 2^{25478556170953} is an apocalyptic number.

It is an amenable number.

25478556170953 is a deficient number, since it is larger than the sum of its proper divisors (1).

25478556170953 is an equidigital number, since it uses as much as digits as its factorization.

25478556170953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520000, while the sum is 67.

The spelling of 25478556170953 in words is "twenty-five trillion, four hundred seventy-eight billion, five hundred fifty-six million, one hundred seventy thousand, nine hundred fifty-three".