127808434553838 has 8 divisors (see below), whose sum is σ = 255616869107688. Its totient is φ = 42602811517944.

The previous prime is 127808434553809. The next prime is 127808434553851. The reversal of 127808434553838 is 838355434808721.

It is a sphenic number, since it is the product of 3 distinct primes.

127808434553838 is an admirable number.

It is a super-2 number, since 2×127808434553838² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10650702879481 + ... + 10650702879492.

It is an arithmetic number, because the mean of its divisors is an integer number (31952108638461).

Almost surely, 2^{127808434553838} is an apocalyptic number.

127808434553838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127808434553838 is a wasteful number, since it uses less digits than its factorization.

127808434553838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21301405758978.

The product of its (nonzero) digits is 619315200, while the sum is 69.

The spelling of 127808434553838 in words is "one hundred twenty-seven trillion, eight hundred eight billion, four hundred thirty-four million, five hundred fifty-three thousand, eight hundred thirty-eight".