1535481565 has 24 divisors (see below), whose sum is σ = 1975832352. Its totient is φ = 1145207040.

The previous prime is 1535481557. The next prime is 1535481581. The reversal of 1535481565 is 5651845351.

It is not a de Polignac number, because 1535481565 - 2³ = 1535481557 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149650 + ... + 159580.

It is an arithmetic number, because the mean of its divisors is an integer number (82326348).

Almost surely, 2^1535481565 is an apocalyptic number.

It is an amenable number.

1535481565 is a deficient number, since it is larger than the sum of its proper divisors (440350787).

1535481565 is a wasteful number, since it uses less digits than its factorization.

1535481565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077 (or 10060 counting only the distinct ones).

The product of its digits is 360000, while the sum is 43.

The square root of 1535481565 is about 39185.2212575098. The cubic root of 1535481565 is about 1153.6698304134.

The spelling of 1535481565 in words is "one billion, five hundred thirty-five million, four hundred eighty-one thousand, five hundred sixty-five".