2691604637327 has 2 divisors, whose sum is σ = 2691604637328. Its totient is φ = 2691604637326.

The previous prime is 2691604637291. The next prime is 2691604637329. The reversal of 2691604637327 is 7237364061962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2691604637327 - 2⁶ = 2691604637263 is a prime.

It is a super-2 number, since 2×2691604637327² (a number of 26 digits) contains 22 as substring.

Together with 2691604637329, 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 (2691604637329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345802318663 + 1345802318664.

It is an arithmetic number, because the mean of its divisors is an integer number (1345802318664).

Almost surely, 2^{2691604637327} is an apocalyptic number.

2691604637327 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691604637327 is an equidigital number, since it uses as much as digits as its factorization.

2691604637327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 2691604637327 in words is "two trillion, six hundred ninety-one billion, six hundred four million, six hundred thirty-seven thousand, three hundred twenty-seven".