125055430505 has 4 divisors (see below), whose sum is σ = 150066516612. Its totient is φ = 100044344400.

The previous prime is 125055430429. The next prime is 125055430519. The reversal of 125055430505 is 505034550521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505034550521 = 43 ⋅11744989547.

It can be written as a sum of positive squares in 2 ways, for example, as 54592789801 + 70462640704 = 233651^2 + 265448^2 .

It is not a de Polignac number, because 125055430505 - 2³² = 120760463209 is a prime.

It is a Duffinian number.

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, 12505543046 + ... + 12505543055.

It is an arithmetic number, because the mean of its divisors is an integer number (37516629153).

Almost surely, 2^125055430505 is an apocalyptic number.

It is an amenable number.

125055430505 is a deficient number, since it is larger than the sum of its proper divisors (25011086107).

125055430505 is an equidigital number, since it uses as much as digits as its factorization.

125055430505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25011086106.

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 125055430505 in words is "one hundred twenty-five billion, fifty-five million, four hundred thirty thousand, five hundred five".