126765667901 has 2 divisors, whose sum is σ = 126765667902. Its totient is φ = 126765667900.

The previous prime is 126765667891. The next prime is 126765667913. The reversal of 126765667901 is 109766567621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126398025625 + 367642276 = 355525^2 + 19174^2 .

It is a cyclic number.

It is not a de Polignac number, because 126765667901 - 2¹⁰ = 126765666877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126765667981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63382833950 + 63382833951.

It is an arithmetic number, because the mean of its divisors is an integer number (63382833951).

Almost surely, 2^126765667901 is an apocalyptic number.

It is an amenable number.

126765667901 is a deficient number, since it is larger than the sum of its proper divisors (1).

126765667901 is an equidigital number, since it uses as much as digits as its factorization.

126765667901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 126765667901 in words is "one hundred twenty-six billion, seven hundred sixty-five million, six hundred sixty-seven thousand, nine hundred one".