1557740774543 has 4 divisors (see below), whose sum is σ = 1557743916960. Its totient is φ = 1557737632128.

The previous prime is 1557740774533. The next prime is 1557740774561. The reversal of 1557740774543 is 3454770477551.

It is a happy number.

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 1557740774543 - 2⁶ = 1557740774479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557740774533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646055 + ... + 1879592.

It is an arithmetic number, because the mean of its divisors is an integer number (389435979240).

Almost surely, 2^{1557740774543} is an apocalyptic number.

1557740774543 is a deficient number, since it is larger than the sum of its proper divisors (3142417).

1557740774543 is an equidigital number, since it uses as much as digits as its factorization.

1557740774543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142416.

The product of its (nonzero) digits is 57624000, while the sum is 59.

The spelling of 1557740774543 in words is "one trillion, five hundred fifty-seven billion, seven hundred forty million, seven hundred seventy-four thousand, five hundred forty-three".