125143656456 has 256 divisors, whose sum is σ = 399913113600. Its totient is φ = 31754612736.

The previous prime is 125143656431. The next prime is 125143656461. The reversal of 125143656456 is 654656341521.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6282160 + ... + 6302048.

It is an arithmetic number, because the mean of its divisors is an integer number (1562160600).

Almost surely, 2^125143656456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125143656456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199956556800).

125143656456 is an abundant number, since it is smaller than the sum of its proper divisors (274769457144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125143656456 is a wasteful number, since it uses less digits than its factorization.

125143656456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20028 (or 20024 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 48.

Adding to 125143656456 its reverse (654656341521), we get a palindrome (779799997977).

The spelling of 125143656456 in words is "one hundred twenty-five billion, one hundred forty-three million, six hundred fifty-six thousand, four hundred fifty-six".