25005027780505 has 16 divisors (see below), whose sum is σ = 30498262678224. Its totient is φ = 19675876366080.

The previous prime is 25005027780503. The next prime is 25005027780521. The reversal of 25005027780505 is 50508772050052.

It can be written as a sum of positive squares in 8 ways, for example, as 4320478187776 + 20684549592729 = 2078576^2 + 4548027^2 .

It is not a de Polignac number, because 25005027780505 - 2¹ = 25005027780503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25005027780503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31942359 + ... + 32715811.

It is an arithmetic number, because the mean of its divisors is an integer number (1906141417389).

Almost surely, 2^{25005027780505} is an apocalyptic number.

It is an amenable number.

25005027780505 is a deficient number, since it is larger than the sum of its proper divisors (5493234897719).

25005027780505 is a wasteful number, since it uses less digits than its factorization.

25005027780505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879516.

The product of its (nonzero) digits is 980000, while the sum is 46.

The spelling of 25005027780505 in words is "twenty-five trillion, five billion, twenty-seven million, seven hundred eighty thousand, five hundred five".