126513752507 has 4 divisors (see below), whose sum is σ = 133172371080. Its totient is φ = 119855133936.

The previous prime is 126513752489. The next prime is 126513752509. The reversal of 126513752507 is 705257315621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 126513752507 - 2²⁰ = 126512703931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126513752509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3329309258 + ... + 3329309295.

It is an arithmetic number, because the mean of its divisors is an integer number (33293092770).

Almost surely, 2^126513752507 is an apocalyptic number.

126513752507 is a deficient number, since it is larger than the sum of its proper divisors (6658618573).

126513752507 is an equidigital number, since it uses as much as digits as its factorization.

126513752507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6658618572.

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 126513752507 in words is "one hundred twenty-six billion, five hundred thirteen million, seven hundred fifty-two thousand, five hundred seven".