126891327663 has 6 divisors (see below), whose sum is σ = 183287473304. Its totient is φ = 84594218436.

The previous prime is 126891327637. The next prime is 126891327763. The reversal of 126891327663 is 366723198621.

It is not a de Polignac number, because 126891327663 - 2⁶ = 126891327599 is a prime.

It is a super-2 number, since 2×126891327663² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126891327763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7049518195 + ... + 7049518212.

Almost surely, 2^126891327663 is an apocalyptic number.

126891327663 is a deficient number, since it is larger than the sum of its proper divisors (56396145641).

126891327663 is a wasteful number, since it uses less digits than its factorization.

126891327663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14099036413 (or 14099036410 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 126891327663 in words is "one hundred twenty-six billion, eight hundred ninety-one million, three hundred twenty-seven thousand, six hundred sixty-three".