127406445081 has 4 divisors (see below), whose sum is σ = 169875260112. Its totient is φ = 84937630052.

The previous prime is 127406445079. The next prime is 127406445143. The reversal of 127406445081 is 180544604721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127406445081 - 2¹ = 127406445079 is a prime.

It is a super-2 number, since 2×127406445081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127406445181) 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, 21234407511 + ... + 21234407516.

It is an arithmetic number, because the mean of its divisors is an integer number (42468815028).

Almost surely, 2^127406445081 is an apocalyptic number.

It is an amenable number.

127406445081 is a deficient number, since it is larger than the sum of its proper divisors (42468815031).

127406445081 is an equidigital number, since it uses as much as digits as its factorization.

127406445081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42468815030.

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 127406445081 in words is "one hundred twenty-seven billion, four hundred six million, four hundred forty-five thousand, eighty-one".