3646861896465 has 12 divisors (see below), whose sum is σ = 6321227287284. Its totient is φ = 1944993011424.

The previous prime is 3646861896463. The next prime is 3646861896499. The reversal of 3646861896465 is 5646981686463.

3646861896465 is a `hidden beast` number, since 3 + 6 + 4 + 6 + 86 + 1 + 89 + 6 + 465 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1069257334401 + 2577604562064 = 1034049^2 + 1605492^2 .

It is not a de Polignac number, because 3646861896465 - 2¹ = 3646861896463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3646861896393 and 3646861896402.

It is not an unprimeable number, because it can be changed into a prime (3646861896463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40520687694 + ... + 40520687783.

It is an arithmetic number, because the mean of its divisors is an integer number (526768940607).

Almost surely, 2^{3646861896465} is an apocalyptic number.

It is an amenable number.

3646861896465 is a deficient number, since it is larger than the sum of its proper divisors (2674365390819).

3646861896465 is a wasteful number, since it uses less digits than its factorization.

3646861896465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81041375488 (or 81041375485 counting only the distinct ones).

The product of its digits is 1074954240, while the sum is 72.

The spelling of 3646861896465 in words is "three trillion, six hundred forty-six billion, eight hundred sixty-one million, eight hundred ninety-six thousand, four hundred sixty-five".