126440120365639 has 8 divisors (see below), whose sum is σ = 126596679825168. Its totient is φ = 126283562516160.

The previous prime is 126440120365609. The next prime is 126440120365687. The reversal of 126440120365639 is 936563021044621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126440120365639 - 2¹⁷ = 126440120234567 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 (126440120365609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264193149 + ... + 264671305.

It is an arithmetic number, because the mean of its divisors is an integer number (15824584978146).

Almost surely, 2^{126440120365639} is an apocalyptic number.

126440120365639 is a deficient number, since it is larger than the sum of its proper divisors (156559459529).

126440120365639 is an equidigital number, since it uses as much as digits as its factorization.

126440120365639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805025.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 126440120365639 in words is "one hundred twenty-six trillion, four hundred forty billion, one hundred twenty million, three hundred sixty-five thousand, six hundred thirty-nine".