128037637009 has 12 divisors (see below), whose sum is σ = 135680082916. Its totient is φ = 120793064832.

The previous prime is 128037636997. The next prime is 128037637037. The reversal of 128037637009 is 900736730821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22792544784 + 105245092225 = 150972^2 + 324415^2 .

It is not a de Polignac number, because 128037637009 - 2¹¹ = 128037634961 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128037637009.

It is not an unprimeable number, because it can be changed into a prime (128037637309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1619172 + ... + 1696405.

Almost surely, 2^128037637009 is an apocalyptic number.

It is an amenable number.

128037637009 is a deficient number, since it is larger than the sum of its proper divisors (7642445907).

128037637009 is an equidigital number, since it uses as much as digits as its factorization.

128037637009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315696 (or 3315673 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 128037637009 in words is "one hundred twenty-eight billion, thirty-seven million, six hundred thirty-seven thousand, nine".