1405018678031 has 2 divisors, whose sum is σ = 1405018678032. Its totient is φ = 1405018678030.

The previous prime is 1405018678009. The next prime is 1405018678067. The reversal of 1405018678031 is 1308768105041.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405018678031 is a prime.

It is a super-2 number, since 2×1405018678031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405018677031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702509339015 + 702509339016.

It is an arithmetic number, because the mean of its divisors is an integer number (702509339016).

Almost surely, 2^{1405018678031} is an apocalyptic number.

1405018678031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405018678031 is an equidigital number, since it uses as much as digits as its factorization.

1405018678031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 1405018678031 in words is "one trillion, four hundred five billion, eighteen million, six hundred seventy-eight thousand, thirty-one".