127838557801 has 2 divisors, whose sum is σ = 127838557802. Its totient is φ = 127838557800.

The previous prime is 127838557739. The next prime is 127838557807. The reversal of 127838557801 is 108755838721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114549079401 + 13289478400 = 338451^2 + 115280^2 .

It is a cyclic number.

It is not a de Polignac number, because 127838557801 - 2³⁵ = 93478819433 is a prime.

It is not a weakly prime, because it can be changed into another prime (127838557807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63919278900 + 63919278901.

It is an arithmetic number, because the mean of its divisors is an integer number (63919278901).

Almost surely, 2^127838557801 is an apocalyptic number.

It is an amenable number.

127838557801 is a deficient number, since it is larger than the sum of its proper divisors (1).

127838557801 is an equidigital number, since it uses as much as digits as its factorization.

127838557801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3763200, while the sum is 55.

The spelling of 127838557801 in words is "one hundred twenty-seven billion, eight hundred thirty-eight million, five hundred fifty-seven thousand, eight hundred one".