25154665466225 has 12 divisors (see below), whose sum is σ = 31500614737500. Its totient is φ = 19924487496000.

The previous prime is 25154665466219. The next prime is 25154665466257. The reversal of 25154665466225 is 52266456645152.

It can be written as a sum of positive squares in 6 ways, for example, as 6144568422976 + 19010097043249 = 2478824^2 + 4360057^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25154665466225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4981119350 + ... + 4981124399.

It is an arithmetic number, because the mean of its divisors is an integer number (2625051228125).

Almost surely, 2^{25154665466225} is an apocalyptic number.

25154665466225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25154665466225 is a deficient number, since it is larger than the sum of its proper divisors (6345949271275).

25154665466225 is a wasteful number, since it uses less digits than its factorization.

25154665466225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9962243860 (or 9962243855 counting only the distinct ones).

The product of its digits is 103680000, while the sum is 59.

The spelling of 25154665466225 in words is "twenty-five trillion, one hundred fifty-four billion, six hundred sixty-five million, four hundred sixty-six thousand, two hundred twenty-five".