25607449349 has 4 divisors (see below), whose sum is σ = 26720816736. Its totient is φ = 24494081964.

The previous prime is 25607449327. The next prime is 25607449409. The reversal of 25607449349 is 94394470652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25607449349 - 2⁸ = 25607449093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25607449349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25607449319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556683659 + ... + 556683704.

It is an arithmetic number, because the mean of its divisors is an integer number (6680204184).

Almost surely, 2^25607449349 is an apocalyptic number.

It is an amenable number.

25607449349 is a deficient number, since it is larger than the sum of its proper divisors (1113367387).

25607449349 is a wasteful number, since it uses less digits than its factorization.

25607449349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113367386.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 25607449349 in words is "twenty-five billion, six hundred seven million, four hundred forty-nine thousand, three hundred forty-nine".