125532666235521 has 8 divisors (see below), whose sum is σ = 185974320348960. Its totient is φ = 83688444156996.

The previous prime is 125532666235513. The next prime is 125532666235567.

125532666235521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 125532666235521 - 2³ = 125532666235513 is a prime.

It is a super-2 number, since 2×125532666235521² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125532666235591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2324679004335 + ... + 2324679004388.

It is an arithmetic number, because the mean of its divisors is an integer number (23246790043620).

Almost surely, 2^{125532666235521} is an apocalyptic number.

It is an amenable number.

125532666235521 is a deficient number, since it is larger than the sum of its proper divisors (60441654113439).

125532666235521 is an equidigital number, since it uses as much as digits as its factorization.

125532666235521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649358008732 (or 4649358008726 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 54.

The spelling of 125532666235521 in words is "one hundred twenty-five trillion, five hundred thirty-two billion, six hundred sixty-six million, two hundred thirty-five thousand, five hundred twenty-one".