127665437481 has 12 divisors (see below), whose sum is σ = 184425209280. Its totient is φ = 85101255960.

The previous prime is 127665437477. The next prime is 127665437503. The reversal of 127665437481 is 184734566721.

127665437481 is a `hidden beast` number, since 1 + 2 + 76 + 65 + 4 + 37 + 481 = 666.

It is not a de Polignac number, because 127665437481 - 2² = 127665437477 is a prime.

It is a super-2 number, since 2×127665437481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127665437381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 662925 + ... + 833546.

It is an arithmetic number, because the mean of its divisors is an integer number (15368767440).

Almost surely, 2^127665437481 is an apocalyptic number.

It is an amenable number.

127665437481 is a deficient number, since it is larger than the sum of its proper divisors (56759771799).

127665437481 is a wasteful number, since it uses less digits than its factorization.

127665437481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505956 (or 1505953 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 127665437481 in words is "one hundred twenty-seven billion, six hundred sixty-five million, four hundred thirty-seven thousand, four hundred eighty-one".