25105016449 has 4 divisors (see below), whose sum is σ = 25106104660. Its totient is φ = 25103928240.

The previous prime is 25105016423. The next prime is 25105016479. The reversal of 25105016449 is 94461050152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5735335824 + 19369680625 = 75732^2 + 139175^2 .

It is a cyclic number.

It is not a de Polignac number, because 25105016449 - 2¹⁵ = 25104983681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25105016479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508734 + ... + 555895.

It is an arithmetic number, because the mean of its divisors is an integer number (6276526165).

Almost surely, 2^25105016449 is an apocalyptic number.

It is an amenable number.

25105016449 is a deficient number, since it is larger than the sum of its proper divisors (1088211).

25105016449 is a wasteful number, since it uses less digits than its factorization.

25105016449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088210.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 25105016449 in words is "twenty-five billion, one hundred five million, sixteen thousand, four hundred forty-nine".