4120402401665 has 16 divisors (see below), whose sum is σ = 5394125836800. Its totient is φ = 2996576008320.

The previous prime is 4120402401649. The next prime is 4120402401677. The reversal of 4120402401665 is 5661042040214.

It is not a de Polignac number, because 4120402401665 - 2⁴ = 4120402401649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108061 + ... + 3077109.

It is an arithmetic number, because the mean of its divisors is an integer number (337132864800).

Almost surely, 2^{4120402401665} is an apocalyptic number.

It is an amenable number.

4120402401665 is a deficient number, since it is larger than the sum of its proper divisors (1273723435135).

4120402401665 is a wasteful number, since it uses less digits than its factorization.

4120402401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007112.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 4120402401665 its reverse (5661042040214), we get a palindrome (9781444441879).

The spelling of 4120402401665 in words is "four trillion, one hundred twenty billion, four hundred two million, four hundred one thousand, six hundred sixty-five".