1291678194904 has 32 divisors (see below), whose sum is σ = 2472993677520. Its totient is φ = 632342370816.

The previous prime is 1291678194887. The next prime is 1291678194949. The reversal of 1291678194904 is 4094918761921.

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, 7992174 + ... + 8152189.

Almost surely, 2^{1291678194904} is an apocalyptic number.

It is an amenable number.

1291678194904 is a deficient number, since it is larger than the sum of its proper divisors (1181315482616).

1291678194904 is a wasteful number, since it uses less digits than its factorization.

1291678194904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16144579 (or 16144575 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 1291678194904 in words is "one trillion, two hundred ninety-one billion, six hundred seventy-eight million, one hundred ninety-four thousand, nine hundred four".