1564158449 has 12 divisors (see below), whose sum is σ = 1858247424. Its totient is φ = 1312179624.

The previous prime is 1564158443. The next prime is 1564158503. The reversal of 1564158449 is 9448514651.

It is not a de Polignac number, because 1564158449 - 2⁴ = 1564158433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1564158443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337289 + ... + 341894.

It is an arithmetic number, because the mean of its divisors is an integer number (154853952).

Almost surely, 2^1564158449 is an apocalyptic number.

It is an amenable number.

1564158449 is a deficient number, since it is larger than the sum of its proper divisors (294088975).

1564158449 is an equidigital number, since it uses as much as digits as its factorization.

1564158449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679244 (or 679237 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 1564158449 is about 39549.4430934242. The cubic root of 1564158449 is about 1160.8076146139.

The spelling of 1564158449 in words is "one billion, five hundred sixty-four million, one hundred fifty-eight thousand, four hundred forty-nine".