47765565 has 16 divisors (see below), whose sum is σ = 84916800. Its totient is φ = 25474896.

The previous prime is 47765539. The next prime is 47765569. The reversal of 47765565 is 56556774.

It is not a de Polignac number, because 47765565 - 2¹⁴ = 47749181 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47765565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47765569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176775 + ... + 177044.

It is an arithmetic number, because the mean of its divisors is an integer number (5307300).

Almost surely, 2^47765565 is an apocalyptic number.

47765565 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47765565 is a deficient number, since it is larger than the sum of its proper divisors (37151235).

47765565 is a wasteful number, since it uses less digits than its factorization.

47765565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353833 (or 353827 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 47765565 is about 6911.2636326507. The cubic root of 47765565 is about 362.8314906698.

The spelling of 47765565 in words is "forty-seven million, seven hundred sixty-five thousand, five hundred sixty-five".