1965120063 has 16 divisors (see below), whose sum is σ = 2666496000. Its totient is φ = 1286966880.

The previous prime is 1965120043. The next prime is 1965120067. The reversal of 1965120063 is 3600215691.

It is a happy number.

It is not a de Polignac number, because 1965120063 - 2⁶ = 1965119999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965120067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147138 + ... + 159936.

It is an arithmetic number, because the mean of its divisors is an integer number (166656000).

Almost surely, 2^1965120063 is an apocalyptic number.

1965120063 is a deficient number, since it is larger than the sum of its proper divisors (701375937).

1965120063 is a wasteful number, since it uses less digits than its factorization.

1965120063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13702.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 1965120063 is about 44329.6747450283. The cubic root of 1965120063 is about 1252.5537260072.

The spelling of 1965120063 in words is "one billion, nine hundred sixty-five million, one hundred twenty thousand, sixty-three".