691846601141 has 2 divisors, whose sum is σ = 691846601142. Its totient is φ = 691846601140.

The previous prime is 691846601111. The next prime is 691846601189. The reversal of 691846601141 is 141106648196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 604434722116 + 87411879025 = 777454^2 + 295655^2 .

It is a cyclic number.

It is not a de Polignac number, because 691846601141 - 2¹⁰ = 691846600117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691846601111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345923300570 + 345923300571.

It is an arithmetic number, because the mean of its divisors is an integer number (345923300571).

Almost surely, 2^691846601141 is an apocalyptic number.

It is an amenable number.

691846601141 is a deficient number, since it is larger than the sum of its proper divisors (1).

691846601141 is an equidigital number, since it uses as much as digits as its factorization.

691846601141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 691846601141 in words is "six hundred ninety-one billion, eight hundred forty-six million, six hundred one thousand, one hundred forty-one".