1565485870 has 48 divisors (see below), whose sum is σ = 3116387520. Its totient is φ = 565698432.

The previous prime is 1565485787. The next prime is 1565485871. The reversal of 1565485870 is 785845651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565485871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69576 + ... + 89284.

It is an arithmetic number, because the mean of its divisors is an integer number (64924740).

Almost surely, 2^1565485870 is an apocalyptic number.

1565485870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1565485870 is a deficient number, since it is larger than the sum of its proper divisors (1550901650).

1565485870 is a wasteful number, since it uses less digits than its factorization.

1565485870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19789 (or 19776 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 49.

The square root of 1565485870 is about 39566.2213257723. The cubic root of 1565485870 is about 1161.1358943825.

The spelling of 1565485870 in words is "one billion, five hundred sixty-five million, four hundred eighty-five thousand, eight hundred seventy".