126604691639 has 2 divisors, whose sum is σ = 126604691640. Its totient is φ = 126604691638.

The previous prime is 126604691611. The next prime is 126604691657. The reversal of 126604691639 is 936196406621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126604691639 - 2²⁴ = 126587914423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126604696639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63302345819 + 63302345820.

It is an arithmetic number, because the mean of its divisors is an integer number (63302345820).

Almost surely, 2^126604691639 is an apocalyptic number.

126604691639 is a deficient number, since it is larger than the sum of its proper divisors (1).

126604691639 is an equidigital number, since it uses as much as digits as its factorization.

126604691639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The spelling of 126604691639 in words is "one hundred twenty-six billion, six hundred four million, six hundred ninety-one thousand, six hundred thirty-nine".