126278811120811 has 4 divisors (see below), whose sum is σ = 129691751961952. Its totient is φ = 122865870279672.

The previous prime is 126278811120751. The next prime is 126278811120829. The reversal of 126278811120811 is 118021118872621.

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 126278811120811 - 2¹⁵ = 126278811088043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126278811120871) 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, 1706470420515 + ... + 1706470420588.

It is an arithmetic number, because the mean of its divisors is an integer number (32422937990488).

Almost surely, 2^{126278811120811} is an apocalyptic number.

126278811120811 is a deficient number, since it is larger than the sum of its proper divisors (3412940841141).

126278811120811 is an equidigital number, since it uses as much as digits as its factorization.

126278811120811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412940841140.

The product of its (nonzero) digits is 172032, while the sum is 49.

The spelling of 126278811120811 in words is "one hundred twenty-six trillion, two hundred seventy-eight billion, eight hundred eleven million, one hundred twenty thousand, eight hundred eleven".