25259371162649 has 8 divisors (see below), whose sum is σ = 27295240672392. Its totient is φ = 23236764647040.

The previous prime is 25259371162603. The next prime is 25259371162651. The reversal of 25259371162649 is 94626117395252.

It can be written as a sum of positive squares in 4 ways, for example, as 1250890138624 + 24008481024025 = 1118432^2 + 4899845^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25259371162649 - 2²⁰ = 25259370114073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25259371162591 and 25259371162600.

It is not an unprimeable number, because it can be changed into a prime (25259371162549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3315744572 + ... + 3315752189.

It is an arithmetic number, because the mean of its divisors is an integer number (3411905084049).

Almost surely, 2^{25259371162649} is an apocalyptic number.

It is an amenable number.

25259371162649 is a deficient number, since it is larger than the sum of its proper divisors (2035869509743).

25259371162649 is a wasteful number, since it uses less digits than its factorization.

25259371162649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6631497067.

The product of its digits is 48988800, while the sum is 62.

The spelling of 25259371162649 in words is "twenty-five trillion, two hundred fifty-nine billion, three hundred seventy-one million, one hundred sixty-two thousand, six hundred forty-nine".