674612216491 has 2 divisors, whose sum is σ = 674612216492. Its totient is φ = 674612216490.

The previous prime is 674612216461. The next prime is 674612216507. The reversal of 674612216491 is 194612216476.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 674612216491 - 2⁷ = 674612216363 is a prime.

It is not a weakly prime, because it can be changed into another prime (674612216461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337306108245 + 337306108246.

It is an arithmetic number, because the mean of its divisors is an integer number (337306108246).

Almost surely, 2^674612216491 is an apocalyptic number.

674612216491 is a deficient number, since it is larger than the sum of its proper divisors (1).

674612216491 is an equidigital number, since it uses as much as digits as its factorization.

674612216491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The spelling of 674612216491 in words is "six hundred seventy-four billion, six hundred twelve million, two hundred sixteen thousand, four hundred ninety-one".