27755000261 has 8 divisors (see below), whose sum is σ = 27976480224. Its totient is φ = 27533666160.

The previous prime is 27755000249. The next prime is 27755000263. The reversal of 27755000261 is 16200055772.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27755000261 is a prime.

It is a super-2 number, since 2×27755000261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27755000263) 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 7 ways as a sum of consecutive naturals, for example, 362966 + ... + 432728.

It is an arithmetic number, because the mean of its divisors is an integer number (3497060028).

Almost surely, 2^27755000261 is an apocalyptic number.

It is an amenable number.

27755000261 is a deficient number, since it is larger than the sum of its proper divisors (221479963).

27755000261 is a wasteful number, since it uses less digits than its factorization.

27755000261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72931.

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 27755000261 in words is "twenty-seven billion, seven hundred fifty-five million, two hundred sixty-one", and thus it is an aban number.