671526212491 has 2 divisors, whose sum is σ = 671526212492. Its totient is φ = 671526212490.

The previous prime is 671526212459. The next prime is 671526212507. The reversal of 671526212491 is 194212625176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671526212491 - 2⁵ = 671526212459 is a prime.

It is not a weakly prime, because it can be changed into another prime (671526215491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335763106245 + 335763106246.

It is an arithmetic number, because the mean of its divisors is an integer number (335763106246).

Almost surely, 2^671526212491 is an apocalyptic number.

671526212491 is a deficient number, since it is larger than the sum of its proper divisors (1).

671526212491 is an equidigital number, since it uses as much as digits as its factorization.

671526212491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The spelling of 671526212491 in words is "six hundred seventy-one billion, five hundred twenty-six million, two hundred twelve thousand, four hundred ninety-one".