1491954647047 has 2 divisors, whose sum is σ = 1491954647048. Its totient is φ = 1491954647046.

The previous prime is 1491954647033. The next prime is 1491954647077. The reversal of 1491954647047 is 7407464591941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491954647047 - 2¹⁹ = 1491954122759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491954647077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745977323523 + 745977323524.

It is an arithmetic number, because the mean of its divisors is an integer number (745977323524).

Almost surely, 2^{1491954647047} is an apocalyptic number.

1491954647047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491954647047 is an equidigital number, since it uses as much as digits as its factorization.

1491954647047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 1491954647047 in words is "one trillion, four hundred ninety-one billion, nine hundred fifty-four million, six hundred forty-seven thousand, forty-seven".