125988597505 has 8 divisors (see below), whose sum is σ = 151188935400. Its totient is φ = 100789132416.

The previous prime is 125988597487. The next prime is 125988597509. The reversal of 125988597505 is 505795889521.

It can be written as a sum of positive squares in 4 ways, for example, as 4064256 + 125984533249 = 2016^2 + 354943^2 .

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 125988597505 - 2¹⁹ = 125988073217 is a prime.

It is a super-3 number, since 3×125988597505³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (125988597509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158491 + ... + 526399.

It is an arithmetic number, because the mean of its divisors is an integer number (18898616925).

Almost surely, 2^125988597505 is an apocalyptic number.

It is an amenable number.

125988597505 is a deficient number, since it is larger than the sum of its proper divisors (25200337895).

125988597505 is an equidigital number, since it uses as much as digits as its factorization.

125988597505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436403.

The product of its (nonzero) digits is 45360000, while the sum is 64.

The spelling of 125988597505 in words is "one hundred twenty-five billion, nine hundred eighty-eight million, five hundred ninety-seven thousand, five hundred five".