125577805504647 has 4 divisors (see below), whose sum is σ = 167437074006200. Its totient is φ = 83718537003096.

The previous prime is 125577805504621. The next prime is 125577805504699. The reversal of 125577805504647 is 746405508775521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125577805504647 - 2¹⁵ = 125577805471879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125577805504147) 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 3 ways as a sum of consecutive naturals, for example, 20929634250772 + ... + 20929634250777.

It is an arithmetic number, because the mean of its divisors is an integer number (41859268501550).

Almost surely, 2^{125577805504647} is an apocalyptic number.

125577805504647 is a deficient number, since it is larger than the sum of its proper divisors (41859268501553).

125577805504647 is an equidigital number, since it uses as much as digits as its factorization.

125577805504647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41859268501552.

The product of its (nonzero) digits is 329280000, while the sum is 66.

The spelling of 125577805504647 in words is "one hundred twenty-five trillion, five hundred seventy-seven billion, eight hundred five million, five hundred four thousand, six hundred forty-seven".