3646401615 has 24 divisors (see below), whose sum is σ = 6491254848. Its totient is φ = 1892185920.

The previous prime is 3646401613. The next prime is 3646401617. The reversal of 3646401615 is 5161046463.

It is a happy number.

3646401615 is a `hidden beast` number, since 3 + 6 + 4 + 640 + 1 + 6 + 1 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (3646401613) and next prime (3646401617).

It is not a de Polignac number, because 3646401615 - 2¹ = 3646401613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3646401615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646401613) 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 23 ways as a sum of consecutive naturals, for example, 1093351 + ... + 1096680.

It is an arithmetic number, because the mean of its divisors is an integer number (270468952).

Almost surely, 2^3646401615 is an apocalyptic number.

3646401615 is a deficient number, since it is larger than the sum of its proper divisors (2844853233).

3646401615 is a wasteful number, since it uses less digits than its factorization.

3646401615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190079 (or 2190076 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 3646401615 is about 60385.4420783685. The cubic root of 3646401615 is about 1539.1755882886.

The spelling of 3646401615 in words is "three billion, six hundred forty-six million, four hundred one thousand, six hundred fifteen".