125313510513 has 4 divisors (see below), whose sum is σ = 167084680688. Its totient is φ = 83542340340.

The previous prime is 125313510479. The next prime is 125313510521. The reversal of 125313510513 is 315015313521.

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 not a de Polignac number, because 125313510513 - 2⁶ = 125313510449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125313510583) 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, 20885585083 + ... + 20885585088.

It is an arithmetic number, because the mean of its divisors is an integer number (41771170172).

Almost surely, 2^125313510513 is an apocalyptic number.

It is an amenable number.

125313510513 is a deficient number, since it is larger than the sum of its proper divisors (41771170175).

125313510513 is an equidigital number, since it uses as much as digits as its factorization.

125313510513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41771170174.

The product of its (nonzero) digits is 6750, while the sum is 30.

The spelling of 125313510513 in words is "one hundred twenty-five billion, three hundred thirteen million, five hundred ten thousand, five hundred thirteen".