4957243443391 has 4 divisors (see below), whose sum is σ = 5062716708192. Its totient is φ = 4851770178592.

The previous prime is 4957243443367. The next prime is 4957243443401. The reversal of 4957243443391 is 1933443427594.

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

It is a de Polignac number, because none of the positive numbers 2^k-4957243443391 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4957243443311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 52736632330 + ... + 52736632423.

It is an arithmetic number, because the mean of its divisors is an integer number (1265679177048).

Almost surely, 2^{4957243443391} is an apocalyptic number.

4957243443391 is a deficient number, since it is larger than the sum of its proper divisors (105473264801).

4957243443391 is a wasteful number, since it uses less digits than its factorization.

4957243443391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105473264800.

The product of its digits is 39191040, while the sum is 58.

The spelling of 4957243443391 in words is "four trillion, nine hundred fifty-seven billion, two hundred forty-three million, four hundred forty-three thousand, three hundred ninety-one".