1564764345 has 32 divisors (see below), whose sum is σ = 2794112640. Its totient is φ = 830848320.

The previous prime is 1564764343. The next prime is 1564764347. The reversal of 1564764345 is 5434674651.

1564764345 is a `hidden beast` number, since 1 + 564 + 7 + 6 + 43 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (1564764343) and next prime (1564764347).

It is not a de Polignac number, because 1564764345 - 2¹ = 1564764343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1564764345.

It is not an unprimeable number, because it can be changed into a prime (1564764343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5115 + ... + 56175.

It is an arithmetic number, because the mean of its divisors is an integer number (87316020).

Almost surely, 2^1564764345 is an apocalyptic number.

1564764345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1564764345 is a deficient number, since it is larger than the sum of its proper divisors (1229348295).

1564764345 is a wasteful number, since it uses less digits than its factorization.

1564764345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51302 (or 51296 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 1564764345 is about 39557.1023332094. The cubic root of 1564764345 is about 1160.9574796305.

The spelling of 1564764345 in words is "one billion, five hundred sixty-four million, seven hundred sixty-four thousand, three hundred forty-five".