127640120257158 has 64 divisors (see below), whose sum is σ = 260814298042368. Its totient is φ = 41625080340480.

The previous prime is 127640120257121. The next prime is 127640120257159. The reversal of 127640120257158 is 851752021046721.

It is a self number, because there is not a number n which added to its sum of digits gives 127640120257158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127640120257159) 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 31 ways as a sum of consecutive naturals, for example, 14609142966 + ... + 14609151702.

It is an arithmetic number, because the mean of its divisors is an integer number (4075223406912).

Almost surely, 2^{127640120257158} is an apocalyptic number.

127640120257158 is an abundant number, since it is smaller than the sum of its proper divisors (133174177785210).

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

127640120257158 is a wasteful number, since it uses less digits than its factorization.

127640120257158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23237.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 127640120257158 in words is "one hundred twenty-seven trillion, six hundred forty billion, one hundred twenty million, two hundred fifty-seven thousand, one hundred fifty-eight".