1564165045 has 4 divisors (see below), whose sum is σ = 1876998060. Its totient is φ = 1251332032.

The previous prime is 1564165027. The next prime is 1564165051. The reversal of 1564165045 is 5405614651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5405614651 = 1039 ⋅5202709.

It can be written as a sum of positive squares in 2 ways, for example, as 1118701809 + 445463236 = 33447^2 + 21106^2 .

It is a cyclic number.

It is not a de Polignac number, because 1564165045 - 2⁵ = 1564165013 is a prime.

It is a super-2 number, since 2×1564165045² = 4893224575999704050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1564164995 and 1564165013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156416500 + ... + 156416509.

It is an arithmetic number, because the mean of its divisors is an integer number (469249515).

Almost surely, 2^1564165045 is an apocalyptic number.

It is an amenable number.

1564165045 is a deficient number, since it is larger than the sum of its proper divisors (312833015).

1564165045 is an equidigital number, since it uses as much as digits as its factorization.

1564165045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312833014.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 1564165045 is about 39549.5264826268. The cubic root of 1564165045 is about 1160.8092463063.

Adding to 1564165045 its reverse (5405614651), we get a palindrome (6969779696).

The spelling of 1564165045 in words is "one billion, five hundred sixty-four million, one hundred sixty-five thousand, forty-five".