6631545327479 has 2 divisors, whose sum is σ = 6631545327480. Its totient is φ = 6631545327478.

The previous prime is 6631545327409. The next prime is 6631545327481. The reversal of 6631545327479 is 9747235451366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6631545327479 - 2¹² = 6631545323383 is a prime.

Together with 6631545327481, 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 (6631545327409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315772663739 + 3315772663740.

It is an arithmetic number, because the mean of its divisors is an integer number (3315772663740).

Almost surely, 2^{6631545327479} is an apocalyptic number.

6631545327479 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631545327479 is an equidigital number, since it uses as much as digits as its factorization.

6631545327479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 62.

The spelling of 6631545327479 in words is "six trillion, six hundred thirty-one billion, five hundred forty-five million, three hundred twenty-seven thousand, four hundred seventy-nine".