3765505505 has 4 divisors (see below), whose sum is σ = 4518606612. Its totient is φ = 3012404400.

The previous prime is 3765505487. The next prime is 3765505507. The reversal of 3765505505 is 5055055673.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5055055673 = 139 ⋅36367307.

It can be written as a sum of positive squares in 2 ways, for example, as 1285365904 + 2480139601 = 35852^2 + 49801^2 .

It is not a de Polignac number, because 3765505505 - 2¹⁰ = 3765504481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3765505507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376550546 + ... + 376550555.

It is an arithmetic number, because the mean of its divisors is an integer number (1129651653).

Almost surely, 2^3765505505 is an apocalyptic number.

It is an amenable number.

3765505505 is a deficient number, since it is larger than the sum of its proper divisors (753101107).

3765505505 is an equidigital number, since it uses as much as digits as its factorization.

3765505505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753101106.

The product of its (nonzero) digits is 393750, while the sum is 41.

The square root of 3765505505 is about 61363.7148891753. The cubic root of 3765505505 is about 1555.7546066416.

The spelling of 3765505505 in words is "three billion, seven hundred sixty-five million, five hundred five thousand, five hundred five".