1123351505641 has 2 divisors, whose sum is σ = 1123351505642. Its totient is φ = 1123351505640.

The previous prime is 1123351505579. The next prime is 1123351505657. The reversal of 1123351505641 is 1465051533211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632707294041 + 490644211600 = 795429^2 + 700460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123351505641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123351505641.

It is not a weakly prime, because it can be changed into another prime (1123351505681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561675752820 + 561675752821.

It is an arithmetic number, because the mean of its divisors is an integer number (561675752821).

Almost surely, 2^{1123351505641} is an apocalyptic number.

It is an amenable number.

1123351505641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123351505641 is an equidigital number, since it uses as much as digits as its factorization.

1123351505641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 1123351505641 in words is "one trillion, one hundred twenty-three billion, three hundred fifty-one million, five hundred five thousand, six hundred forty-one".