125554044521 has 8 divisors (see below), whose sum is σ = 128741682720. Its totient is φ = 122405044608.

The previous prime is 125554044509. The next prime is 125554044541. The reversal of 125554044521 is 125440455521.

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 125554044521 - 2¹⁰ = 125554043497 is a prime.

It is a super-3 number, since 3×125554044521³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125554044541) 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, 9652991 + ... + 9665988.

It is an arithmetic number, because the mean of its divisors is an integer number (16092710340).

Almost surely, 2^125554044521 is an apocalyptic number.

It is an amenable number.

125554044521 is a deficient number, since it is larger than the sum of its proper divisors (3187638199).

125554044521 is an equidigital number, since it uses as much as digits as its factorization.

125554044521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19319143.

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 125554044521 in words is "one hundred twenty-five billion, five hundred fifty-four million, forty-four thousand, five hundred twenty-one".