126440120365731 has 16 divisors (see below), whose sum is σ = 189249817428000. Its totient is φ = 83424409311744.

The previous prime is 126440120365723. The next prime is 126440120365763. The reversal of 126440120365731 is 137563021044621.

126440120365731 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 40 + 1 + 2 + 0 + 36 + 573 + 1 = 666.

It is not a de Polignac number, because 126440120365731 - 2³ = 126440120365723 is a prime.

It is a super-2 number, since 2×126440120365731² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126440120365781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24139004706 + ... + 24139009943.

It is an arithmetic number, because the mean of its divisors is an integer number (11828113589250).

Almost surely, 2^{126440120365731} is an apocalyptic number.

126440120365731 is a deficient number, since it is larger than the sum of its proper divisors (62809697062269).

126440120365731 is an equidigital number, since it uses as much as digits as its factorization.

126440120365731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48278014755 (or 48278014749 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 126440120365731 in words is "one hundred twenty-six trillion, four hundred forty billion, one hundred twenty million, three hundred sixty-five thousand, seven hundred thirty-one".