1131911437633 has 2 divisors, whose sum is σ = 1131911437634. Its totient is φ = 1131911437632.

The previous prime is 1131911437577. The next prime is 1131911437661. The reversal of 1131911437633 is 3367341191311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583440851889 + 548470585744 = 763833^2 + 740588^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131911437633 - 2²¹ = 1131909340481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131911437633.

It is not a weakly prime, because it can be changed into another prime (1131911437133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565955718816 + 565955718817.

It is an arithmetic number, because the mean of its divisors is an integer number (565955718817).

Almost surely, 2^{1131911437633} is an apocalyptic number.

It is an amenable number.

1131911437633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131911437633 is an equidigital number, since it uses as much as digits as its factorization.

1131911437633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The spelling of 1131911437633 in words is "one trillion, one hundred thirty-one billion, nine hundred eleven million, four hundred thirty-seven thousand, six hundred thirty-three".