3501881865 has 24 divisors (see below), whose sum is σ = 6123653640. Its totient is φ = 1851139584.

The previous prime is 3501881857. The next prime is 3501881869. The reversal of 3501881865 is 5681881053.

3501881865 is a `hidden beast` number, since 3 + 501 + 8 + 81 + 8 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33143049 + 3468738816 = 5757^2 + 58896^2 .

It is not a de Polignac number, because 3501881865 - 2³ = 3501881857 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 3501881865.

It is not an unprimeable number, because it can be changed into a prime (3501881869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339250 + ... + 349419.

It is an arithmetic number, because the mean of its divisors is an integer number (255152235).

Almost surely, 2^3501881865 is an apocalyptic number.

It is an amenable number.

3501881865 is a deficient number, since it is larger than the sum of its proper divisors (2621771775).

3501881865 is a wasteful number, since it uses less digits than its factorization.

3501881865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688793 (or 688790 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 3501881865 is about 59176.7003557988. The cubic root of 3501881865 is about 1518.5665538730.

The spelling of 3501881865 in words is "three billion, five hundred one million, eight hundred eighty-one thousand, eight hundred sixty-five".