125783556065 has 4 divisors (see below), whose sum is σ = 150940267284. Its totient is φ = 100626844848.

The previous prime is 125783556047. The next prime is 125783556089. The reversal of 125783556065 is 560655387521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560655387521 = 83 ⋅6754884187.

It can be written as a sum of positive squares in 2 ways, for example, as 21165594256 + 104617961809 = 145484^2 + 323447^2 .

It is a cyclic number.

It is not a de Polignac number, because 125783556065 - 2⁸ = 125783555809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125783555998 and 125783556016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12578355602 + ... + 12578355611.

It is an arithmetic number, because the mean of its divisors is an integer number (37735066821).

Almost surely, 2^125783556065 is an apocalyptic number.

It is an amenable number.

125783556065 is a deficient number, since it is larger than the sum of its proper divisors (25156711219).

125783556065 is an equidigital number, since it uses as much as digits as its factorization.

125783556065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25156711218.

The product of its (nonzero) digits is 7560000, while the sum is 53.

The spelling of 125783556065 in words is "one hundred twenty-five billion, seven hundred eighty-three million, five hundred fifty-six thousand, sixty-five".