25149743909 has 8 divisors (see below), whose sum is σ = 25204166520. Its totient is φ = 25095381696.

The previous prime is 25149743903. The next prime is 25149743911. The reversal of 25149743909 is 90934794152.

It can be written as a sum of positive squares in 4 ways, for example, as 758176225 + 24391567684 = 27535^2 + 156178^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25149743909 - 2²⁸ = 24881308453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25149743903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 874247 + ... + 902555.

It is an arithmetic number, because the mean of its divisors is an integer number (3150520815).

Almost surely, 2^25149743909 is an apocalyptic number.

It is an amenable number.

25149743909 is a deficient number, since it is larger than the sum of its proper divisors (54422611).

25149743909 is a wasteful number, since it uses less digits than its factorization.

25149743909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30199.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 25149743909 in words is "twenty-five billion, one hundred forty-nine million, seven hundred forty-three thousand, nine hundred nine".