126402526517 has 2 divisors, whose sum is σ = 126402526518. Its totient is φ = 126402526516.

The previous prime is 126402526513. The next prime is 126402526541. The reversal of 126402526517 is 715625204621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63577605316 + 62824921201 = 252146^2 + 250649^2 .

It is a cyclic number.

It is not a de Polignac number, because 126402526517 - 2² = 126402526513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126402526511) 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 as a sum of consecutive naturals, namely, 63201263258 + 63201263259.

It is an arithmetic number, because the mean of its divisors is an integer number (63201263259).

Almost surely, 2^126402526517 is an apocalyptic number.

It is an amenable number.

126402526517 is a deficient number, since it is larger than the sum of its proper divisors (1).

126402526517 is an equidigital number, since it uses as much as digits as its factorization.

126402526517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 126402526517 in words is "one hundred twenty-six billion, four hundred two million, five hundred twenty-six thousand, five hundred seventeen".