126521481713 has 8 divisors (see below), whose sum is σ = 138039380256. Its totient is φ = 115006240800.

The previous prime is 126521481679. The next prime is 126521481817. The reversal of 126521481713 is 317184125621.

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

It is not a de Polignac number, because 126521481713 - 2²⁴ = 126504704497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126521487713) 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, 564203 + ... + 755888.

It is an arithmetic number, because the mean of its divisors is an integer number (17254922532).

Almost surely, 2^126521481713 is an apocalyptic number.

It is an amenable number.

126521481713 is a deficient number, since it is larger than the sum of its proper divisors (11517898543).

126521481713 is a wasteful number, since it uses less digits than its factorization.

126521481713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328815.

The product of its digits is 80640, while the sum is 41.

The spelling of 126521481713 in words is "one hundred twenty-six billion, five hundred twenty-one million, four hundred eighty-one thousand, seven hundred thirteen".