126425210643663 has 4 divisors (see below), whose sum is σ = 168566947524888. Its totient is φ = 84283473762440.

The previous prime is 126425210643653. The next prime is 126425210643671. The reversal of 126425210643663 is 366346012524621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126425210643663 - 2¹⁴ = 126425210627279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126425210643653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21070868440608 + ... + 21070868440613.

It is an arithmetic number, because the mean of its divisors is an integer number (42141736881222).

Almost surely, 2^{126425210643663} is an apocalyptic number.

126425210643663 is a deficient number, since it is larger than the sum of its proper divisors (42141736881225).

126425210643663 is an equidigital number, since it uses as much as digits as its factorization.

126425210643663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42141736881224.

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 126425210643663 in words is "one hundred twenty-six trillion, four hundred twenty-five billion, two hundred ten million, six hundred forty-three thousand, six hundred sixty-three".