128725911653 has 8 divisors (see below), whose sum is σ = 132891430656. Its totient is φ = 124561209600.

The previous prime is 128725911649. The next prime is 128725911659. The reversal of 128725911653 is 356119527821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128725911653 - 2² = 128725911649 is a prime.

It is a super-2 number, since 2×128725911653² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128725911659) 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 7 ways as a sum of consecutive naturals, for example, 124418 + ... + 522428.

It is an arithmetic number, because the mean of its divisors is an integer number (16611428832).

Almost surely, 2^128725911653 is an apocalyptic number.

It is an amenable number.

128725911653 is a deficient number, since it is larger than the sum of its proper divisors (4165519003).

128725911653 is a wasteful number, since it uses less digits than its factorization.

128725911653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408475.

The product of its digits is 907200, while the sum is 50.

The spelling of 128725911653 in words is "one hundred twenty-eight billion, seven hundred twenty-five million, nine hundred eleven thousand, six hundred fifty-three".