1556854849 has 27 divisors (see below), whose sum is σ = 1826493123. Its totient is φ = 1325755200.

The previous prime is 1556854841. The next prime is 1556854903. The reversal of 1556854849 is 9484586551.

The square root of 1556854849 is 39457.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1212084225 + 344770624 = 34815^2 + 18568^2 .

It is not a de Polignac number, because 1556854849 - 2³ = 1556854841 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 1556854849.

It is not an unprimeable number, because it can be changed into a prime (1556854841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7378354 + ... + 7378564.

Almost surely, 2^1556854849 is an apocalyptic number.

1556854849 is the 39457-th square number.

1556854849 is the 19729-th centered octagonal number.

It is an amenable number.

1556854849 is a deficient number, since it is larger than the sum of its proper divisors (269638274).

1556854849 is an equidigital number, since it uses as much as digits as its factorization.

1556854849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 239 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 55.

The cubic root of 1556854849 is about 1158.9980569930.

The spelling of 1556854849 in words is "one billion, five hundred fifty-six million, eight hundred fifty-four thousand, eight hundred forty-nine".