126613313501 has 4 divisors (see below), whose sum is σ = 126614461212. Its totient is φ = 126612165792.

The previous prime is 126613313471. The next prime is 126613313521. The reversal of 126613313501 is 105313316621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105313316621 = 163 ⋅646093967.

It can be written as a sum of positive squares in 2 ways, for example, as 26978391001 + 99634922500 = 164251^2 + 315650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126613313501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126613313521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388400 + ... + 635673.

It is an arithmetic number, because the mean of its divisors is an integer number (31653615303).

Almost surely, 2^126613313501 is an apocalyptic number.

It is an amenable number.

126613313501 is a deficient number, since it is larger than the sum of its proper divisors (1147711).

126613313501 is a wasteful number, since it uses less digits than its factorization.

126613313501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147710.

The product of its (nonzero) digits is 9720, while the sum is 32.

The spelling of 126613313501 in words is "one hundred twenty-six billion, six hundred thirteen million, three hundred thirteen thousand, five hundred one".