25454270645 has 12 divisors (see below), whose sum is σ = 32237377740. Its totient is φ = 19291656384.

The previous prime is 25454270641. The next prime is 25454270693. The reversal of 25454270645 is 54607245452.

It can be written as a sum of positive squares in 2 ways, for example, as 3429039364 + 22025231281 = 58558^2 + 148409^2 .

It is not a de Polignac number, because 25454270645 - 2² = 25454270641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25454270596 and 25454270605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25454270641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7049240 + ... + 7052849.

It is an arithmetic number, because the mean of its divisors is an integer number (2686448145).

Almost surely, 2^25454270645 is an apocalyptic number.

It is an amenable number.

25454270645 is a deficient number, since it is larger than the sum of its proper divisors (6783107095).

25454270645 is a wasteful number, since it uses less digits than its factorization.

25454270645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14102132 (or 14102113 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 44.

The spelling of 25454270645 in words is "twenty-five billion, four hundred fifty-four million, two hundred seventy thousand, six hundred forty-five".