1067891156641 has 2 divisors, whose sum is σ = 1067891156642. Its totient is φ = 1067891156640.

The previous prime is 1067891156597. The next prime is 1067891156663. The reversal of 1067891156641 is 1466511987601.

1067891156641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1061561363041 + 6329793600 = 1030321^2 + 79560^2 .

It is an emirp because it is prime and its reverse (1466511987601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1067891156641 - 2²³ = 1067882768033 is a prime.

It is a super-2 number, since 2×1067891156641² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1067891156041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533945578320 + 533945578321.

It is an arithmetic number, because the mean of its divisors is an integer number (533945578321).

Almost surely, 2^{1067891156641} is an apocalyptic number.

It is an amenable number.

1067891156641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1067891156641 is an equidigital number, since it uses as much as digits as its factorization.

1067891156641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 1067891156641 in words is "one trillion, sixty-seven billion, eight hundred ninety-one million, one hundred fifty-six thousand, six hundred forty-one".