125560065521 has 4 divisors (see below), whose sum is σ = 136974616944. Its totient is φ = 114145514100.

The previous prime is 125560065511. The next prime is 125560065523.

125560065521 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125560065521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125560065523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5707275695 + ... + 5707275716.

It is an arithmetic number, because the mean of its divisors is an integer number (34243654236).

Almost surely, 2^125560065521 is an apocalyptic number.

125560065521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125560065521 is a deficient number, since it is larger than the sum of its proper divisors (11414551423).

125560065521 is a wasteful number, since it uses less digits than its factorization.

125560065521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11414551422.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 125560065521 in words is "one hundred twenty-five billion, five hundred sixty million, sixty-five thousand, five hundred twenty-one".