691013836741 has 2 divisors, whose sum is σ = 691013836742. Its totient is φ = 691013836740.

The previous prime is 691013836729. The next prime is 691013836753. The reversal of 691013836741 is 147638310196.

691013836741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (691013836729) and next prime (691013836753).

It can be written as a sum of positive squares in only one way, i.e., 555703157025 + 135310679716 = 745455^2 + 367846^2 .

It is a cyclic number.

It is not a de Polignac number, because 691013836741 - 2²⁵ = 690980282309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691013836141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345506918370 + 345506918371.

It is an arithmetic number, because the mean of its divisors is an integer number (345506918371).

Almost surely, 2^691013836741 is an apocalyptic number.

It is an amenable number.

691013836741 is a deficient number, since it is larger than the sum of its proper divisors (1).

691013836741 is an equidigital number, since it uses as much as digits as its factorization.

691013836741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 691013836741 in words is "six hundred ninety-one billion, thirteen million, eight hundred thirty-six thousand, seven hundred forty-one".