491102811924479 has 2 divisors, whose sum is σ = 491102811924480. Its totient is φ = 491102811924478.

The previous prime is 491102811924469. The next prime is 491102811924499. The reversal of 491102811924479 is 974429118201194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491102811924479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491102811924469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245551405962239 + 245551405962240.

It is an arithmetic number, because the mean of its divisors is an integer number (245551405962240).

Almost surely, 2^{491102811924479} is an apocalyptic number.

491102811924479 is a deficient number, since it is larger than the sum of its proper divisors (1).

491102811924479 is an equidigital number, since it uses as much as digits as its factorization.

491102811924479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The spelling of 491102811924479 in words is "four hundred ninety-one trillion, one hundred two billion, eight hundred eleven million, nine hundred twenty-four thousand, four hundred seventy-nine".