7127404878401 has 4 divisors (see below), whose sum is σ = 7127424377172. Its totient is φ = 7127385379632.

The previous prime is 7127404878361. The next prime is 7127404878403. The reversal of 7127404878401 is 1048784047217.

It is a happy number.

It is a Cunningham number, because it is equal to 2669720²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1380333615376 + 5747071263025 = 1174876^2 + 2397305^2 .

It is a cyclic number.

It is not a de Polignac number, because 7127404878401 - 2²² = 7127400684097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7127404878403) 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, 9190406 + ... + 9935711.

It is an arithmetic number, because the mean of its divisors is an integer number (1781856094293).

Almost surely, 2^{7127404878401} is an apocalyptic number.

It is an amenable number.

7127404878401 is a deficient number, since it is larger than the sum of its proper divisors (19498771).

7127404878401 is a wasteful number, since it uses less digits than its factorization.

7127404878401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19498770.

The product of its (nonzero) digits is 2809856, while the sum is 53.

The spelling of 7127404878401 in words is "seven trillion, one hundred twenty-seven billion, four hundred four million, eight hundred seventy-eight thousand, four hundred one".