1564403745 has 8 divisors (see below), whose sum is σ = 2503046016. Its totient is φ = 834348656.

The previous prime is 1564403723. The next prime is 1564403777. The reversal of 1564403745 is 5473044651.

It is a happy number.

1564403745 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1564403745 - 2⁹ = 1564403233 is a prime.

It is a Curzon 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, 52146777 + ... + 52146806.

It is an arithmetic number, because the mean of its divisors is an integer number (312880752).

Almost surely, 2^1564403745 is an apocalyptic number.

1564403745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1564403745 is a deficient number, since it is larger than the sum of its proper divisors (938642271).

1564403745 is a wasteful number, since it uses less digits than its factorization.

1564403745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104293591.

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 1564403745 is about 39552.5441027502. The cubic root of 1564403745 is about 1160.8682918812.

The spelling of 1564403745 in words is "one billion, five hundred sixty-four million, four hundred three thousand, seven hundred forty-five".