1291387904179 has 8 divisors (see below), whose sum is σ = 1292288271872. Its totient is φ = 1290487688640.

The previous prime is 1291387904167. The next prime is 1291387904197. The reversal of 1291387904179 is 9714097831921.

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 1291387904179 - 2²³ = 1291379515571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291387904479) 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, 20844709 + ... + 20906569.

It is an arithmetic number, because the mean of its divisors is an integer number (161536033984).

Almost surely, 2^{1291387904179} is an apocalyptic number.

1291387904179 is a deficient number, since it is larger than the sum of its proper divisors (900367693).

1291387904179 is a wasteful number, since it uses less digits than its factorization.

1291387904179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76077.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 1291387904179 in words is "one trillion, two hundred ninety-one billion, three hundred eighty-seven million, nine hundred four thousand, one hundred seventy-nine".