1965192015647 has 12 divisors (see below), whose sum is σ = 2286490254840. Its totient is φ = 1684118305296.

The previous prime is 1965192015617. The next prime is 1965192015719. The reversal of 1965192015647 is 7465102915691.

It is a happy number.

It is not a de Polignac number, because 1965192015647 - 2²⁰ = 1965190967071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1965192015592 and 1965192015601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965192015617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3700997 + ... + 4198542.

It is an arithmetic number, because the mean of its divisors is an integer number (190540854570).

Almost surely, 2^{1965192015647} is an apocalyptic number.

1965192015647 is a deficient number, since it is larger than the sum of its proper divisors (321298239193).

1965192015647 is an equidigital number, since it uses as much as digits as its factorization.

1965192015647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7904630 (or 7904623 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 56.

The spelling of 1965192015647 in words is "one trillion, nine hundred sixty-five billion, one hundred ninety-two million, fifteen thousand, six hundred forty-seven".