27172454417 has 2 divisors, whose sum is σ = 27172454418. Its totient is φ = 27172454416.

The previous prime is 27172454389. The next prime is 27172454461. The reversal of 27172454417 is 71445427172.

It is a happy number.

It is an a-pointer prime, because the next prime (27172454461) can be obtained adding 27172454417 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19746151441 + 7426302976 = 140521^2 + 86176^2 .

It is a cyclic number.

It is not a de Polignac number, because 27172454417 - 2²⁴ = 27155677201 is a prime.

It is not a weakly prime, because it can be changed into another prime (27172451417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13586227208 + 13586227209.

It is an arithmetic number, because the mean of its divisors is an integer number (13586227209).

Almost surely, 2^27172454417 is an apocalyptic number.

It is an amenable number.

27172454417 is a deficient number, since it is larger than the sum of its proper divisors (1).

27172454417 is an equidigital number, since it uses as much as digits as its factorization.

27172454417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 44.

The spelling of 27172454417 in words is "twenty-seven billion, one hundred seventy-two million, four hundred fifty-four thousand, four hundred seventeen".