125642551443 has 8 divisors (see below), whose sum is σ = 171419295168. Its totient is φ = 81813754344.

The previous prime is 125642551439. The next prime is 125642551451. The reversal of 125642551443 is 344155246521.

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

It is not a de Polignac number, because 125642551443 - 2² = 125642551439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125642551395 and 125642551404.

It is not an unprimeable number, because it can be changed into a prime (125642551543) 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, 486986505 + ... + 486986762.

It is an arithmetic number, because the mean of its divisors is an integer number (21427411896).

Almost surely, 2^125642551443 is an apocalyptic number.

125642551443 is a deficient number, since it is larger than the sum of its proper divisors (45776743725).

125642551443 is an equidigital number, since it uses as much as digits as its factorization.

125642551443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973973313.

The product of its digits is 576000, while the sum is 42.

Adding to 125642551443 its reverse (344155246521), we get a palindrome (469797797964).

The spelling of 125642551443 in words is "one hundred twenty-five billion, six hundred forty-two million, five hundred fifty-one thousand, four hundred forty-three".