658947749891 has 2 divisors, whose sum is σ = 658947749892. Its totient is φ = 658947749890.

The previous prime is 658947749879. The next prime is 658947749893. The reversal of 658947749891 is 198947749856.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 658947749891 - 2¹⁸ = 658947487747 is a prime.

Together with 658947749893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (658947749893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329473874945 + 329473874946.

It is an arithmetic number, because the mean of its divisors is an integer number (329473874946).

Almost surely, 2^658947749891 is an apocalyptic number.

658947749891 is a deficient number, since it is larger than the sum of its proper divisors (1).

658947749891 is an equidigital number, since it uses as much as digits as its factorization.

658947749891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1097349120, while the sum is 77.

The spelling of 658947749891 in words is "six hundred fifty-eight billion, nine hundred forty-seven million, seven hundred forty-nine thousand, eight hundred ninety-one".