1557045743 has 16 divisors (see below), whose sum is σ = 1774386432. Its totient is φ = 1352472000.

The previous prime is 1557045739. The next prime is 1557045767. The reversal of 1557045743 is 3475407551.

It is not a de Polignac number, because 1557045743 - 2² = 1557045739 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 1557045743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557045043) 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 15 ways as a sum of consecutive naturals, for example, 273203 + ... + 278843.

It is an arithmetic number, because the mean of its divisors is an integer number (110899152).

Almost surely, 2^1557045743 is an apocalyptic number.

1557045743 is a deficient number, since it is larger than the sum of its proper divisors (217340689).

1557045743 is a wasteful number, since it uses less digits than its factorization.

1557045743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766.

The product of its (nonzero) digits is 294000, while the sum is 41.

The square root of 1557045743 is about 39459.4189389555. The cubic root of 1557045743 is about 1159.0454252995.

The spelling of 1557045743 in words is "one billion, five hundred fifty-seven million, forty-five thousand, seven hundred forty-three".