1556447045 has 4 divisors (see below), whose sum is σ = 1867736460. Its totient is φ = 1245157632.

The previous prime is 1556447027. The next prime is 1556447047. The reversal of 1556447045 is 5407446551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 726949444 + 829497601 = 26962^2 + 28801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1556447045 - 2⁶ = 1556446981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556446993 and 1556447011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556447047) 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, 155644700 + ... + 155644709.

It is an arithmetic number, because the mean of its divisors is an integer number (466934115).

Almost surely, 2^1556447045 is an apocalyptic number.

It is an amenable number.

1556447045 is a deficient number, since it is larger than the sum of its proper divisors (311289415).

1556447045 is an equidigital number, since it uses as much as digits as its factorization.

1556447045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311289414.

The product of its (nonzero) digits is 336000, while the sum is 41.

The square root of 1556447045 is about 39451.8319599990. The cubic root of 1556447045 is about 1158.8968518147.

The spelling of 1556447045 in words is "one billion, five hundred fifty-six million, four hundred forty-seven thousand, forty-five".