25068538645 has 8 divisors (see below), whose sum is σ = 30084711480. Its totient is φ = 20053187520.

The previous prime is 25068538601. The next prime is 25068538667. The reversal of 25068538645 is 54683586052.

It can be written as a sum of positive squares in 4 ways, for example, as 4769697969 + 20298840676 = 69063^2 + 142474^2 .

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

It is not a de Polignac number, because 25068538645 - 2⁹ = 25068538133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25068538592 and 25068538601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136186 + ... + 262075.

It is an arithmetic number, because the mean of its divisors is an integer number (3760588935).

Almost surely, 2^25068538645 is an apocalyptic number.

It is an amenable number.

25068538645 is a deficient number, since it is larger than the sum of its proper divisors (5016172835).

25068538645 is a wasteful number, since it uses less digits than its factorization.

25068538645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410855.

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 25068538645 in words is "twenty-five billion, sixty-eight million, five hundred thirty-eight thousand, six hundred forty-five".