126640815659 has 2 divisors, whose sum is σ = 126640815660. Its totient is φ = 126640815658.

The previous prime is 126640815641. The next prime is 126640815671. The reversal of 126640815659 is 956518046621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126640815659 - 2¹⁶ = 126640750123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126640815659.

It is not a weakly prime, because it can be changed into another prime (126640815619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63320407829 + 63320407830.

It is an arithmetic number, because the mean of its divisors is an integer number (63320407830).

Almost surely, 2^126640815659 is an apocalyptic number.

126640815659 is a deficient number, since it is larger than the sum of its proper divisors (1).

126640815659 is an equidigital number, since it uses as much as digits as its factorization.

126640815659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 126640815659 in words is "one hundred twenty-six billion, six hundred forty million, eight hundred fifteen thousand, six hundred fifty-nine".