2185494642629 has 2 divisors, whose sum is σ = 2185494642630. Its totient is φ = 2185494642628.

The previous prime is 2185494642619. The next prime is 2185494642631. The reversal of 2185494642629 is 9262464945812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1300963797604 + 884530845025 = 1140598^2 + 940495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2185494642629 is a prime.

Together with 2185494642631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185494642619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092747321314 + 1092747321315.

It is an arithmetic number, because the mean of its divisors is an integer number (1092747321315).

Almost surely, 2^{2185494642629} is an apocalyptic number.

It is an amenable number.

2185494642629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185494642629 is an equidigital number, since it uses as much as digits as its factorization.

2185494642629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59719680, while the sum is 62.

The spelling of 2185494642629 in words is "two trillion, one hundred eighty-five billion, four hundred ninety-four million, six hundred forty-two thousand, six hundred twenty-nine".