27761025261 has 4 divisors (see below), whose sum is σ = 37014700352. Its totient is φ = 18507350172.

The previous prime is 27761025203. The next prime is 27761025263. The reversal of 27761025261 is 16252016772.

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 not a de Polignac number, because 27761025261 - 2⁹ = 27761024749 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 (27761025263) 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, 4626837541 + ... + 4626837546.

It is an arithmetic number, because the mean of its divisors is an integer number (9253675088).

Almost surely, 2^27761025261 is an apocalyptic number.

It is an amenable number.

27761025261 is a deficient number, since it is larger than the sum of its proper divisors (9253675091).

27761025261 is an equidigital number, since it uses as much as digits as its factorization.

27761025261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9253675090.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 27761025261 in words is "twenty-seven billion, seven hundred sixty-one million, twenty-five thousand, two hundred sixty-one".