12291690641 has 2 divisors, whose sum is σ = 12291690642. Its totient is φ = 12291690640.

The previous prime is 12291690581. The next prime is 12291690667. The reversal of 12291690641 is 14609619221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12025315600 + 266375041 = 109660^2 + 16321^2 .

It is an emirp because it is prime and its reverse (14609619221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12291690641 - 2²² = 12287496337 is a prime.

It is not a weakly prime, because it can be changed into another prime (12291690041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6145845320 + 6145845321.

It is an arithmetic number, because the mean of its divisors is an integer number (6145845321).

Almost surely, 2^12291690641 is an apocalyptic number.

It is an amenable number.

12291690641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12291690641 is an equidigital number, since it uses as much as digits as its factorization.

12291690641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 12291690641 in words is "twelve billion, two hundred ninety-one million, six hundred ninety thousand, six hundred forty-one".