1243474654691 has 8 divisors (see below), whose sum is σ = 1324230747264. Its totient is φ = 1163564176000.

The previous prime is 1243474654687. The next prime is 1243474654711. The reversal of 1243474654691 is 1964564743421.

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 1243474654691 - 2² = 1243474654687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243474654291) 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, 211400435 + ... + 211406316.

It is an arithmetic number, because the mean of its divisors is an integer number (165528843408).

Almost surely, 2^{1243474654691} is an apocalyptic number.

1243474654691 is a deficient number, since it is larger than the sum of its proper divisors (80756092573).

1243474654691 is a wasteful number, since it uses less digits than its factorization.

1243474654691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422806941.

The product of its digits is 17418240, while the sum is 56.

The spelling of 1243474654691 in words is "one trillion, two hundred forty-three billion, four hundred seventy-four million, six hundred fifty-four thousand, six hundred ninety-one".