1291678017976 has 32 divisors (see below), whose sum is σ = 2446935194880. Its totient is φ = 639196297600.

The previous prime is 1291678017901. The next prime is 1291678017983. The reversal of 1291678017976 is 6797108761921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844515 + ... + 2446546.

It is an arithmetic number, because the mean of its divisors is an integer number (76466724840).

Almost surely, 2^{1291678017976} is an apocalyptic number.

It is an amenable number.

1291678017976 is a deficient number, since it is larger than the sum of its proper divisors (1155257176904).

1291678017976 is a wasteful number, since it uses less digits than its factorization.

1291678017976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291455 (or 4291451 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 64.

The spelling of 1291678017976 in words is "one trillion, two hundred ninety-one billion, six hundred seventy-eight million, seventeen thousand, nine hundred seventy-six".