1564360645 has 8 divisors (see below), whose sum is σ = 1877811480. Its totient is φ = 1251102720.

The previous prime is 1564360591. The next prime is 1564360673. The reversal of 1564360645 is 5460634651.

It can be written as a sum of positive squares in 4 ways, for example, as 835036609 + 729324036 = 28897^2 + 27006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1564360645 - 2⁷ = 1564360517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1564360598 and 1564360607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29740 + ... + 63349.

It is an arithmetic number, because the mean of its divisors is an integer number (234726435).

Almost surely, 2^1564360645 is an apocalyptic number.

It is an amenable number.

1564360645 is a deficient number, since it is larger than the sum of its proper divisors (313450835).

1564360645 is an equidigital number, since it uses as much as digits as its factorization.

1564360645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96455.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 1564360645 is about 39551.9992541464. Note that the first 3 decimals coincide. The cubic root of 1564360645 is about 1160.8576309754.

The spelling of 1564360645 in words is "one billion, five hundred sixty-four million, three hundred sixty thousand, six hundred forty-five".