65127251009 has 8 divisors (see below), whose sum is σ = 65182694280. Its totient is φ = 65071835136.

The previous prime is 65127251003. The next prime is 65127251027. The reversal of 65127251009 is 90015272156.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23622153025 + 41505097984 = 153695^2 + 203728^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 65127251009 - 2⁸ = 65127250753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65127251003) 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, 8805617 + ... + 8813009.

It is an arithmetic number, because the mean of its divisors is an integer number (8147836785).

Almost surely, 2^65127251009 is an apocalyptic number.

It is an amenable number.

65127251009 is a deficient number, since it is larger than the sum of its proper divisors (55443271).

65127251009 is a wasteful number, since it uses less digits than its factorization.

65127251009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13699.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 65127251009 in words is "sixty-five billion, one hundred twenty-seven million, two hundred fifty-one thousand, nine".