3681669465 has 12 divisors (see below), whose sum is σ = 6381560484. Its totient is φ = 1963557024.

The previous prime is 3681669449. The next prime is 3681669479. The reversal of 3681669465 is 5649661863.

It can be written as a sum of positive squares in 2 ways, for example, as 1857696201 + 1823973264 = 43101^2 + 42708^2 .

It is not a de Polignac number, because 3681669465 - 2⁴ = 3681669449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40907394 + ... + 40907483.

It is an arithmetic number, because the mean of its divisors is an integer number (531796707).

Almost surely, 2^3681669465 is an apocalyptic number.

It is an amenable number.

3681669465 is a deficient number, since it is larger than the sum of its proper divisors (2699891019).

3681669465 is a wasteful number, since it uses less digits than its factorization.

3681669465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81814888 (or 81814885 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 3681669465 is about 60676.7621499368. The cubic root of 3681669465 is about 1544.1219568680.

The spelling of 3681669465 in words is "three billion, six hundred eighty-one million, six hundred sixty-nine thousand, four hundred sixty-five".