125044510601621 has 8 divisors (see below), whose sum is σ = 135898762405560. Its totient is φ = 114366750697152.

The previous prime is 125044510601609. The next prime is 125044510601629. The reversal of 125044510601621 is 126106015440521.

It can be written as a sum of positive squares in 4 ways, for example, as 960194211025 + 124084316390596 = 979895^2 + 11139314^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-125044510601621 is a prime.

It is a super-2 number, since 2×125044510601621² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125044510601629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44122973390 + ... + 44122976223.

It is an arithmetic number, because the mean of its divisors is an integer number (16987345300695).

Almost surely, 2^{125044510601621} is an apocalyptic number.

It is an amenable number.

125044510601621 is a deficient number, since it is larger than the sum of its proper divisors (10854251803939).

125044510601621 is a wasteful number, since it uses less digits than its factorization.

125044510601621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88245949735.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 125044510601621 in words is "one hundred twenty-five trillion, forty-four billion, five hundred ten million, six hundred one thousand, six hundred twenty-one".