126263887639 has 2 divisors, whose sum is σ = 126263887640. Its totient is φ = 126263887638.

The previous prime is 126263887621. The next prime is 126263887699. The reversal of 126263887639 is 936788362621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126263887639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126263887699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63131943819 + 63131943820.

It is an arithmetic number, because the mean of its divisors is an integer number (63131943820).

Almost surely, 2^126263887639 is an apocalyptic number.

126263887639 is a deficient number, since it is larger than the sum of its proper divisors (1).

126263887639 is an equidigital number, since it uses as much as digits as its factorization.

126263887639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 61.

The spelling of 126263887639 in words is "one hundred twenty-six billion, two hundred sixty-three million, eight hundred eighty-seven thousand, six hundred thirty-nine".