126785002601 has 2 divisors, whose sum is σ = 126785002602. Its totient is φ = 126785002600.

The previous prime is 126785002579. The next prime is 126785002657. The reversal of 126785002601 is 106200587621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106291648576 + 20493354025 = 326024^2 + 143155^2 .

It is an emirp because it is prime and its reverse (106200587621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126785002601 is a prime.

It is not a weakly prime, because it can be changed into another prime (126785002681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63392501300 + 63392501301.

It is an arithmetic number, because the mean of its divisors is an integer number (63392501301).

Almost surely, 2^126785002601 is an apocalyptic number.

It is an amenable number.

126785002601 is a deficient number, since it is larger than the sum of its proper divisors (1).

126785002601 is an equidigital number, since it uses as much as digits as its factorization.

126785002601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 126785002601 in words is "one hundred twenty-six billion, seven hundred eighty-five million, two thousand, six hundred one".