127478989701 has 16 divisors (see below), whose sum is σ = 215837443200. Its totient is φ = 72845136864.

The previous prime is 127478989697. The next prime is 127478989727. The reversal of 127478989701 is 107989874721.

127478989701 is a `hidden beast` number, since 1 + 2 + 7 + 478 + 98 + 9 + 70 + 1 = 666.

It is not a de Polignac number, because 127478989701 - 2² = 127478989697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127478989741) 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 15 ways as a sum of consecutive naturals, for example, 337245816 + ... + 337246193.

It is an arithmetic number, because the mean of its divisors is an integer number (13489840200).

Almost surely, 2^127478989701 is an apocalyptic number.

It is an amenable number.

127478989701 is a deficient number, since it is larger than the sum of its proper divisors (88358453499).

127478989701 is an equidigital number, since it uses as much as digits as its factorization.

127478989701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674492025 (or 674492019 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 63.

Adding to 127478989701 its sum of digits (63), we get a square (127478989764 = 357042²).

The spelling of 127478989701 in words is "one hundred twenty-seven billion, four hundred seventy-eight million, nine hundred eighty-nine thousand, seven hundred one".