125551641265 has 8 divisors (see below), whose sum is σ = 150703576128. Its totient is φ = 100413575280.

The previous prime is 125551641209. The next prime is 125551641287. The reversal of 125551641265 is 562146155521.

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

It is not a de Polignac number, because 125551641265 - 2¹⁷ = 125551510193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3447291 + ... + 3483520.

It is an arithmetic number, because the mean of its divisors is an integer number (18837947016).

Almost surely, 2^125551641265 is an apocalyptic number.

It is an amenable number.

125551641265 is a deficient number, since it is larger than the sum of its proper divisors (25151934863).

125551641265 is an equidigital number, since it uses as much as digits as its factorization.

125551641265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934439.

The product of its digits is 360000, while the sum is 43.

Adding to 125551641265 its reverse (562146155521), we get a palindrome (687697796786).

The spelling of 125551641265 in words is "one hundred twenty-five billion, five hundred fifty-one million, six hundred forty-one thousand, two hundred sixty-five".