127877774445461 has 4 divisors (see below), whose sum is σ = 128157594521292. Its totient is φ = 127597954369632.

The previous prime is 127877774445397. The next prime is 127877774445527. The reversal of 127877774445461 is 164544477778721.

It is a happy number.

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 55051502908900 + 72826271536561 = 7419670^2 + 8533831^2 .

It is a cyclic number.

It is not a de Polignac number, because 127877774445461 - 2⁶ = 127877774445397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127877774444461) 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, 139910037230 + ... + 139910038143.

It is an arithmetic number, because the mean of its divisors is an integer number (32039398630323).

Almost surely, 2^{127877774445461} is an apocalyptic number.

It is an amenable number.

127877774445461 is a deficient number, since it is larger than the sum of its proper divisors (279820075831).

127877774445461 is an equidigital number, since it uses as much as digits as its factorization.

127877774445461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279820075830.

The product of its digits is 2065244160, while the sum is 74.

The spelling of 127877774445461 in words is "one hundred twenty-seven trillion, eight hundred seventy-seven billion, seven hundred seventy-four million, four hundred forty-five thousand, four hundred sixty-one".