1281613070831 has 2 divisors, whose sum is σ = 1281613070832. Its totient is φ = 1281613070830.

The previous prime is 1281613070827. The next prime is 1281613070849. The reversal of 1281613070831 is 1380703161821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281613070831 - 2² = 1281613070827 is a prime.

It is a super-2 number, since 2×1281613070831² (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 (1281613000831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640806535415 + 640806535416.

It is an arithmetic number, because the mean of its divisors is an integer number (640806535416).

Almost surely, 2^{1281613070831} is an apocalyptic number.

1281613070831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281613070831 is an equidigital number, since it uses as much as digits as its factorization.

1281613070831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 1281613070831 in words is "one trillion, two hundred eighty-one billion, six hundred thirteen million, seventy thousand, eight hundred thirty-one".