1963989616 has 40 divisors (see below), whose sum is σ = 3850259024. Its totient is φ = 970444800.

The previous prime is 1963989613. The next prime is 1963989623. The reversal of 1963989616 is 6169893691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963989613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482791 + ... + 486841.

Almost surely, 2^1963989616 is an apocalyptic number.

1963989616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1963989616 is a deficient number, since it is larger than the sum of its proper divisors (1886269408).

1963989616 is a wasteful number, since it uses less digits than its factorization.

1963989616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4403 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 58.

The square root of 1963989616 is about 44316.9224563259. The cubic root of 1963989616 is about 1252.3135002782.

The spelling of 1963989616 in words is "one billion, nine hundred sixty-three million, nine hundred eighty-nine thousand, six hundred sixteen".