25275527749 has 8 divisors (see below), whose sum is σ = 25429036248. Its totient is φ = 25122447360.

The previous prime is 25275527737. The next prime is 25275527759. The reversal of 25275527749 is 94772557252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4117788900 + 21157738849 = 64170^2 + 145457^2 .

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 25275527749 - 2¹¹ = 25275525701 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 25275527749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25275527729) 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, 11809 + ... + 225145.

It is an arithmetic number, because the mean of its divisors is an integer number (3178629531).

Almost surely, 2^25275527749 is an apocalyptic number.

It is an amenable number.

25275527749 is a deficient number, since it is larger than the sum of its proper divisors (153508499).

25275527749 is a wasteful number, since it uses less digits than its factorization.

25275527749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214055.

The product of its digits is 12348000, while the sum is 55.

The spelling of 25275527749 in words is "twenty-five billion, two hundred seventy-five million, five hundred twenty-seven thousand, seven hundred forty-nine".