1963648667 has 16 divisors (see below), whose sum is σ = 2122632000. Its totient is φ = 1810980864.

The previous prime is 1963648639. The next prime is 1963648669. The reversal of 1963648667 is 7668463691.

It is not a de Polignac number, because 1963648667 - 2¹⁰ = 1963647643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1963648669) 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, 618059 + ... + 621227.

It is an arithmetic number, because the mean of its divisors is an integer number (132664500).

Almost surely, 2^1963648667 is an apocalyptic number.

1963648667 is a deficient number, since it is larger than the sum of its proper divisors (158983333).

1963648667 is a wasteful number, since it uses less digits than its factorization.

1963648667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150.

The product of its digits is 7838208, while the sum is 56.

The square root of 1963648667 is about 44313.0755759516. The cubic root of 1963648667 is about 1252.2410287909.

The spelling of 1963648667 in words is "one billion, nine hundred sixty-three million, six hundred forty-eight thousand, six hundred sixty-seven".