127634023561 has 8 divisors (see below), whose sum is σ = 140387838048. Its totient is φ = 116030929300.

The previous prime is 127634023547. The next prime is 127634023571. The reversal of 127634023561 is 165320436721.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-127634023561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127634023541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47945335 + ... + 47947996.

It is an arithmetic number, because the mean of its divisors is an integer number (17548479756).

Almost surely, 2^127634023561 is an apocalyptic number.

127634023561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127634023561 is a deficient number, since it is larger than the sum of its proper divisors (12753814487).

127634023561 is an frugal number, since it uses more digits than its factorization.

127634023561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95893364 (or 95893342 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 127634023561 in words is "one hundred twenty-seven billion, six hundred thirty-four million, twenty-three thousand, five hundred sixty-one".