126378221767 has 12 divisors (see below), whose sum is σ = 147018408240. Its totient is φ = 108319026816.

The previous prime is 126378221737. The next prime is 126378221861. The reversal of 126378221767 is 767122873621.

It is not a de Polignac number, because 126378221767 - 2²³ = 126369833159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126378221737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1267063 + ... + 1363159.

It is an arithmetic number, because the mean of its divisors is an integer number (12251534020).

Almost surely, 2^126378221767 is an apocalyptic number.

126378221767 is a deficient number, since it is larger than the sum of its proper divisors (20640186473).

126378221767 is an equidigital number, since it uses as much as digits as its factorization.

126378221767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122950 (or 122943 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The spelling of 126378221767 in words is "one hundred twenty-six billion, three hundred seventy-eight million, two hundred twenty-one thousand, seven hundred sixty-seven".