25149350899 has 4 divisors (see below), whose sum is σ = 25197438136. Its totient is φ = 25101263664.

The previous prime is 25149350887. The next prime is 25149350909. The reversal of 25149350899 is 99805394152.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-25149350899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25149350869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24042834 + ... + 24043879.

It is an arithmetic number, because the mean of its divisors is an integer number (6299359534).

Almost surely, 2^25149350899 is an apocalyptic number.

25149350899 is a deficient number, since it is larger than the sum of its proper divisors (48087237).

25149350899 is an equidigital number, since it uses as much as digits as its factorization.

25149350899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48087236.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 25149350899 in words is "twenty-five billion, one hundred forty-nine million, three hundred fifty thousand, eight hundred ninety-nine".