125543556541 has 4 divisors (see below), whose sum is σ = 135200753212. Its totient is φ = 115886359872.

The previous prime is 125543556539. The next prime is 125543556583. The reversal of 125543556541 is 145655345521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41807980900 + 83735575641 = 204470^2 + 289371^2 .

It is a cyclic number.

It is not a de Polignac number, because 125543556541 - 2¹ = 125543556539 is a prime.

It is a super-2 number, since 2×125543556541² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125543556491 and 125543556500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125543559541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4828598316 + ... + 4828598341.

It is an arithmetic number, because the mean of its divisors is an integer number (33800188303).

Almost surely, 2^125543556541 is an apocalyptic number.

It is an amenable number.

125543556541 is a deficient number, since it is larger than the sum of its proper divisors (9657196671).

125543556541 is an equidigital number, since it uses as much as digits as its factorization.

125543556541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9657196670.

The product of its digits is 1800000, while the sum is 46.

The spelling of 125543556541 in words is "one hundred twenty-five billion, five hundred forty-three million, five hundred fifty-six thousand, five hundred forty-one".