64127444456 has 8 divisors (see below), whose sum is σ = 120238958370. Its totient is φ = 32063722224.

The previous prime is 64127444333. The next prime is 64127444543. The reversal of 64127444456 is 65444472146.

It can be written as a sum of positive squares in only one way, i.e., 48916168900 + 15211275556 = 221170^2 + 123334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×64127444456² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64127444456.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4007965271 + ... + 4007965286.

Almost surely, 2^64127444456 is an apocalyptic number.

It is an amenable number.

64127444456 is a deficient number, since it is larger than the sum of its proper divisors (56111513914).

64127444456 is a wasteful number, since it uses less digits than its factorization.

64127444456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015930563 (or 8015930559 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 47.

The spelling of 64127444456 in words is "sixty-four billion, one hundred twenty-seven million, four hundred forty-four thousand, four hundred fifty-six".