27251996261 has 24 divisors (see below), whose sum is σ = 32821883640. Its totient is φ = 22534512000.

The previous prime is 27251996249. The next prime is 27251996273. The reversal of 27251996261 is 16269915272.

It is an interprime number because it is at equal distance from previous prime (27251996249) and next prime (27251996273).

It can be written as a sum of positive squares in 4 ways, for example, as 3065836900 + 24186159361 = 55370^2 + 155519^2 .

It is not a de Polignac number, because 27251996261 - 2⁶ = 27251996197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27251990261) 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 23 ways as a sum of consecutive naturals, for example, 1841351 + ... + 1856091.

It is an arithmetic number, because the mean of its divisors is an integer number (1367578485).

Almost surely, 2^27251996261 is an apocalyptic number.

It is an amenable number.

27251996261 is a deficient number, since it is larger than the sum of its proper divisors (5569887379).

27251996261 is a wasteful number, since it uses less digits than its factorization.

27251996261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16085 (or 16078 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The spelling of 27251996261 in words is "twenty-seven billion, two hundred fifty-one million, nine hundred ninety-six thousand, two hundred sixty-one".