127630654891 has 4 divisors (see below), whose sum is σ = 134348057800. Its totient is φ = 120913251984.

The previous prime is 127630654889. The next prime is 127630654909. The reversal of 127630654891 is 198456036721.

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

It is a cyclic number.

It is not a de Polignac number, because 127630654891 - 2¹ = 127630654889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127630654391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3358701426 + ... + 3358701463.

It is an arithmetic number, because the mean of its divisors is an integer number (33587014450).

It is a 1-persistent number, because it is pandigital, but 2⋅127630654891 = 255261309782 is not.

Almost surely, 2^127630654891 is an apocalyptic number.

127630654891 is a deficient number, since it is larger than the sum of its proper divisors (6717402909).

127630654891 is an equidigital number, since it uses as much as digits as its factorization.

127630654891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717402908.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 127630654891 in words is "one hundred twenty-seven billion, six hundred thirty million, six hundred fifty-four thousand, eight hundred ninety-one".