1974136864247 has 4 divisors (see below), whose sum is σ = 1993682773896. Its totient is φ = 1954590954600.

The previous prime is 1974136864229. The next prime is 1974136864279. The reversal of 1974136864247 is 7424686314791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1974136864247 - 2³⁸ = 1699258957303 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 1974136864247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974136804247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9772954673 + ... + 9772954874.

It is an arithmetic number, because the mean of its divisors is an integer number (498420693474).

Almost surely, 2^{1974136864247} is an apocalyptic number.

1974136864247 is a deficient number, since it is larger than the sum of its proper divisors (19545909649).

1974136864247 is a wasteful number, since it uses less digits than its factorization.

1974136864247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19545909648.

The product of its digits is 48771072, while the sum is 62.

The spelling of 1974136864247 in words is "one trillion, nine hundred seventy-four billion, one hundred thirty-six million, eight hundred sixty-four thousand, two hundred forty-seven".