125005016513 has 8 divisors (see below), whose sum is σ = 134657450088. Its totient is φ = 115357820544.

The previous prime is 125005016503. The next prime is 125005016533. The reversal of 125005016513 is 315610500521.

It can be written as a sum of positive squares in 4 ways, for example, as 2677855504 + 122327161009 = 51748^2 + 349753^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 125005016513 - 2¹² = 125005012417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125005016503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1259756 + ... + 1355357.

It is an arithmetic number, because the mean of its divisors is an integer number (16832181261).

Almost surely, 2^125005016513 is an apocalyptic number.

125005016513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

125005016513 is a deficient number, since it is larger than the sum of its proper divisors (9652433575).

125005016513 is a wasteful number, since it uses less digits than its factorization.

125005016513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618803.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 125005016513 in words is "one hundred twenty-five billion, five million, sixteen thousand, five hundred thirteen".