64127007727 has 4 divisors (see below), whose sum is σ = 65860170136. Its totient is φ = 62393845320.

The previous prime is 64127007709. The next prime is 64127007731. The reversal of 64127007727 is 72770072146.

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

It is a cyclic number.

It is not a de Polignac number, because 64127007727 - 2¹⁵ = 64126974959 is a prime.

It is a super-2 number, since 2×64127007727² (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 (64127007127) 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, 866581149 + ... + 866581222.

It is an arithmetic number, because the mean of its divisors is an integer number (16465042534).

Almost surely, 2^64127007727 is an apocalyptic number.

64127007727 is a deficient number, since it is larger than the sum of its proper divisors (1733162409).

64127007727 is a wasteful number, since it uses less digits than its factorization.

64127007727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733162408.

The product of its (nonzero) digits is 230496, while the sum is 43.

The spelling of 64127007727 in words is "sixty-four billion, one hundred twenty-seven million, seven thousand, seven hundred twenty-seven".