125535421653 has 16 divisors (see below), whose sum is σ = 174666464640. Its totient is φ = 80047683584.

The previous prime is 125535421601. The next prime is 125535421657. The reversal of 125535421653 is 356124535521.

It is a cyclic number.

It is not a de Polignac number, because 125535421653 - 2¹⁰ = 125535420629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125535421657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2222125 + ... + 2277917.

It is an arithmetic number, because the mean of its divisors is an integer number (10916654040).

Almost surely, 2^125535421653 is an apocalyptic number.

It is an amenable number.

125535421653 is a deficient number, since it is larger than the sum of its proper divisors (49131042987).

125535421653 is a wasteful number, since it uses less digits than its factorization.

125535421653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88428.

The product of its digits is 540000, while the sum is 42.

The spelling of 125535421653 in words is "one hundred twenty-five billion, five hundred thirty-five million, four hundred twenty-one thousand, six hundred fifty-three".