128357570249999 has 16 divisors (see below), whose sum is σ = 135938493658368. Its totient is φ = 120943355915712.

The previous prime is 128357570249983. The next prime is 128357570250011. The reversal of 128357570249999 is 999942075753821.

It is a Cunningham number, because it is equal to 11329500²-1.

It is not a de Polignac number, because 128357570249999 - 2⁴ = 128357570249983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128357570249939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260332184 + ... + 260824770.

It is an arithmetic number, because the mean of its divisors is an integer number (8496155853648).

Almost surely, 2^{128357570249999} is an apocalyptic number.

128357570249999 is a deficient number, since it is larger than the sum of its proper divisors (7580923408369).

128357570249999 is a wasteful number, since it uses less digits than its factorization.

128357570249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661774.

The product of its (nonzero) digits is 3086294400, while the sum is 80.

The spelling of 128357570249999 in words is "one hundred twenty-eight trillion, three hundred fifty-seven billion, five hundred seventy million, two hundred forty-nine thousand, nine hundred ninety-nine".