25045495749 has 6 divisors (see below), whose sum is σ = 36176827206. Its totient is φ = 16696997160.

The previous prime is 25045495721. The next prime is 25045495751. The reversal of 25045495749 is 94759454052.

It is a happy number.

25045495749 is a `hidden beast` number, since 2 + 5 + 0 + 4 + 549 + 57 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24989918724 + 55577025 = 158082^2 + 7455^2 .

It is not a de Polignac number, because 25045495749 - 2⁷ = 25045495621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25045495695 and 25045495704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25045495549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1391416422 + ... + 1391416439.

It is an arithmetic number, because the mean of its divisors is an integer number (6029471201).

Almost surely, 2^25045495749 is an apocalyptic number.

It is an amenable number.

25045495749 is a deficient number, since it is larger than the sum of its proper divisors (11131331457).

25045495749 is a wasteful number, since it uses less digits than its factorization.

25045495749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782832867 (or 2782832864 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 25045495749 in words is "twenty-five billion, forty-five million, four hundred ninety-five thousand, seven hundred forty-nine".