125523021105550 has 24 divisors (see below), whose sum is σ = 233494128372456. Its totient is φ = 50204625836640.

The previous prime is 125523021105541. The next prime is 125523021105557. The reversal of 125523021105550 is 55501120325521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125523021105557) 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, 114011812 + ... + 115107511.

It is an arithmetic number, because the mean of its divisors is an integer number (9728922015519).

Almost surely, 2^{125523021105550} is an apocalyptic number.

125523021105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125523021105550 is a deficient number, since it is larger than the sum of its proper divisors (107971107266906).

125523021105550 is a wasteful number, since it uses less digits than its factorization.

125523021105550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229130292 (or 229130287 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 125523021105550 in words is "one hundred twenty-five trillion, five hundred twenty-three billion, twenty-one million, one hundred five thousand, five hundred fifty".