127617664 has 16 divisors (see below), whose sum is σ = 254238570. Its totient is φ = 63808768.

The previous prime is 127617631. The next prime is 127617667. The reversal of 127617664 is 466716721.

It can be written as a sum of positive squares in only one way, i.e., 100160064 + 27457600 = 10008^2 + 5240^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (127617667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498379 + ... + 498634.

Almost surely, 2^127617664 is an apocalyptic number.

It is an amenable number.

127617664 is a deficient number, since it is larger than the sum of its proper divisors (126620906).

127617664 is an frugal number, since it uses more digits than its factorization.

127617664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997027 (or 997015 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 127617664 is about 11296.7988386091. The cubic root of 127617664 is about 503.4661349603.

The spelling of 127617664 in words is "one hundred twenty-seven million, six hundred seventeen thousand, six hundred sixty-four".