27754042517 has 4 divisors (see below), whose sum is σ = 27825390060. Its totient is φ = 27682694976.

The previous prime is 27754042489. The next prime is 27754042553. The reversal of 27754042517 is 71524045772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18498448081 + 9255594436 = 136009^2 + 96206^2 .

It is a cyclic number.

It is not a de Polignac number, because 27754042517 - 2¹² = 27754038421 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 (27754042567) 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, 35673188 + ... + 35673965.

It is an arithmetic number, because the mean of its divisors is an integer number (6956347515).

Almost surely, 2^27754042517 is an apocalyptic number.

It is an amenable number.

27754042517 is a deficient number, since it is larger than the sum of its proper divisors (71347543).

27754042517 is an equidigital number, since it uses as much as digits as its factorization.

27754042517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71347542.

The product of its (nonzero) digits is 548800, while the sum is 44.

The spelling of 27754042517 in words is "twenty-seven billion, seven hundred fifty-four million, forty-two thousand, five hundred seventeen".