25481606749 has 8 divisors (see below), whose sum is σ = 25967485440. Its totient is φ = 24995916816.

The previous prime is 25481606741. The next prime is 25481606779. The reversal of 25481606749 is 94760618452.

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

It is not a de Polignac number, because 25481606749 - 2³ = 25481606741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25481606696 and 25481606705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481606741) 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, 242112 + ... + 331030.

It is an arithmetic number, because the mean of its divisors is an integer number (3245935680).

Almost surely, 2^25481606749 is an apocalyptic number.

It is an amenable number.

25481606749 is a deficient number, since it is larger than the sum of its proper divisors (485878691).

25481606749 is an equidigital number, since it uses as much as digits as its factorization.

25481606749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94379.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 25481606749 in words is "twenty-five billion, four hundred eighty-one million, six hundred six thousand, seven hundred forty-nine".