126502640125 has 16 divisors (see below), whose sum is σ = 158414164272. Its totient is φ = 100856683200.

The previous prime is 126502640093. The next prime is 126502640177. The reversal of 126502640125 is 521046205621.

It can be written as a sum of positive squares in 8 ways, for example, as 7991823609 + 118510816516 = 89397^2 + 344254^2 .

It is not a de Polignac number, because 126502640125 - 2⁵ = 126502640093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1690374 + ... + 1763623.

It is an arithmetic number, because the mean of its divisors is an integer number (9900885267).

Almost surely, 2^126502640125 is an apocalyptic number.

It is an amenable number.

126502640125 is a deficient number, since it is larger than the sum of its proper divisors (31911524147).

126502640125 is an equidigital number, since it uses as much as digits as its factorization.

126502640125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454305 (or 3454295 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 126502640125 its reverse (521046205621), we get a palindrome (647548845746).

The spelling of 126502640125 in words is "one hundred twenty-six billion, five hundred two million, six hundred forty thousand, one hundred twenty-five".