1291292658647 has 8 divisors (see below), whose sum is σ = 1321365649296. Its totient is φ = 1261221619392.

The previous prime is 1291292658599. The next prime is 1291292658703. The reversal of 1291292658647 is 7468562921921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1291292658647 - 2⁸ = 1291292658391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1291292658647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291292652647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896213 + ... + 1840049.

It is an arithmetic number, because the mean of its divisors is an integer number (165170706162).

Almost surely, 2^{1291292658647} is an apocalyptic number.

1291292658647 is a deficient number, since it is larger than the sum of its proper divisors (30072990649).

1291292658647 is an equidigital number, since it uses as much as digits as its factorization.

1291292658647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975697.

The product of its digits is 26127360, while the sum is 62.

The spelling of 1291292658647 in words is "one trillion, two hundred ninety-one billion, two hundred ninety-two million, six hundred fifty-eight thousand, six hundred forty-seven".