25055550025505 has 16 divisors (see below), whose sum is σ = 30178959400080. Its totient is φ = 19969576380672.

The previous prime is 25055550025489. The next prime is 25055550025507. The reversal of 25055550025505 is 50552005555052.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11920840359649 + 13134709665856 = 3452657^2 + 3624184^2 .

It is a cyclic number.

It is not a de Polignac number, because 25055550025505 - 2⁴ = 25055550025489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25055550025507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99507827 + ... + 99759303.

It is an arithmetic number, because the mean of its divisors is an integer number (1886184962505).

Almost surely, 2^{25055550025505} is an apocalyptic number.

It is an amenable number.

25055550025505 is a deficient number, since it is larger than the sum of its proper divisors (5123409374575).

25055550025505 is a wasteful number, since it uses less digits than its factorization.

25055550025505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325828.

The product of its (nonzero) digits is 1562500, while the sum is 44.

The spelling of 25055550025505 in words is "twenty-five trillion, fifty-five billion, five hundred fifty million, twenty-five thousand, five hundred five".