127217648225 has 6 divisors (see below), whose sum is σ = 157749883830. Its totient is φ = 101774118560.

The previous prime is 127217648221. The next prime is 127217648249. The reversal of 127217648225 is 522846712721.

It can be written as a sum of positive squares in 3 ways, for example, as 265820416 + 126951827809 = 16304^2 + 356303^2 .

It is not a de Polignac number, because 127217648225 - 2² = 127217648221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127217648225.

It is not an unprimeable number, because it can be changed into a prime (127217648221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2544352940 + ... + 2544352989.

It is an arithmetic number, because the mean of its divisors is an integer number (26291647305).

Almost surely, 2^127217648225 is an apocalyptic number.

It is an amenable number.

127217648225 is a deficient number, since it is larger than the sum of its proper divisors (30532235605).

127217648225 is an equidigital number, since it uses as much as digits as its factorization.

127217648225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088705939 (or 5088705934 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The spelling of 127217648225 in words is "one hundred twenty-seven billion, two hundred seventeen million, six hundred forty-eight thousand, two hundred twenty-five".