1564309945 has 16 divisors (see below), whose sum is σ = 2048719680. Its totient is φ = 1137182400.

The previous prime is 1564309937. The next prime is 1564309973. The reversal of 1564309945 is 5499034651.

It is not a de Polignac number, because 1564309945 - 2³ = 1564309937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1564309895 and 1564309904.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161335 + ... + 170755.

It is an arithmetic number, because the mean of its divisors is an integer number (128044980).

Almost surely, 2^1564309945 is an apocalyptic number.

It is an amenable number.

1564309945 is a deficient number, since it is larger than the sum of its proper divisors (484409735).

1564309945 is a wasteful number, since it uses less digits than its factorization.

1564309945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12456.

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 1564309945 is about 39551.3583205432. The cubic root of 1564309945 is about 1160.8450899377.

It can be divided in two parts, 156430 and 9945, that added together give a cube (166375 = 55³).

The spelling of 1564309945 in words is "one billion, five hundred sixty-four million, three hundred nine thousand, nine hundred forty-five".