1564399003849 has 16 divisors (see below), whose sum is σ = 1741344011136. Its totient is φ = 1393423257600.

The previous prime is 1564399003841. The next prime is 1564399003913. The reversal of 1564399003849 is 9483009934651.

It is not a de Polignac number, because 1564399003849 - 2³ = 1564399003841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1564399003841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4363437 + ... + 4708330.

It is an arithmetic number, because the mean of its divisors is an integer number (108834000696).

Almost surely, 2^{1564399003849} is an apocalyptic number.

It is an amenable number.

1564399003849 is a deficient number, since it is larger than the sum of its proper divisors (176945007287).

1564399003849 is a wasteful number, since it uses less digits than its factorization.

1564399003849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072096.

The product of its (nonzero) digits is 25194240, while the sum is 61.

The spelling of 1564399003849 in words is "one trillion, five hundred sixty-four billion, three hundred ninety-nine million, three thousand, eight hundred forty-nine".