25154480849 has 2 divisors, whose sum is σ = 25154480850. Its totient is φ = 25154480848.

The previous prime is 25154480837. The next prime is 25154480921. The reversal of 25154480849 is 94808445152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21840406225 + 3314074624 = 147785^2 + 57568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25154480849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25154480797 and 25154480806.

It is not a weakly prime, because it can be changed into another prime (25154482849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577240424 + 12577240425.

It is an arithmetic number, because the mean of its divisors is an integer number (12577240425).

Almost surely, 2^25154480849 is an apocalyptic number.

It is an amenable number.

25154480849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25154480849 is an equidigital number, since it uses as much as digits as its factorization.

25154480849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1843200, while the sum is 50.

The spelling of 25154480849 in words is "twenty-five billion, one hundred fifty-four million, four hundred eighty thousand, eight hundred forty-nine".